Swimwear is the part of an activewear range that has to survive the water it is sold for. Chlorinated water weakens swim knits and tests their colour, the lining decides what a pale suit shows when it is wet, and a UPF number means little without the test behind it. This page sets out what swimwear makers with production in mainland China publish about themselves, in their own words, read on 26 October 2026 — and where their own pages disagree. It is not a ranking, and it makes no claim about who is best.

The short answer

  • SEAMDANCE publishes this page and appears in its first row. SEAMDANCE is an activewear manufacturer in Xiamen, China, with its own factory and a one-stop service; swimwear is produced through that one-stop service, at a partner factory named for each order, and inspected to the same AQL 2.5 standard as the rest of a range.
  • Of the seven other makers, two are in Xingcheng, Liaoning — the city a China Daily opinion piece credits with one in every four swimwear items sold worldwide [46] — and four are in Guangdong. Published minimums run from 50 pieces to 300, and three of the seven publish different minimums, sample times or lead times on different pages.
  • No company printed a certificate, label or audit number in its page text, so none of the certificate claims could be confirmed in a public database. Of the seven, one publishes UPF 50+ and two make chlorine-resistance claims for their fabrics; none names the test method.

What was checked, and how

Each company was included because its own English website presents swimwear — bikinis, one-pieces, rash guards or swim shorts — among its main products and gives a location in mainland China. Every figure in the tables is the company's own wording, from the page cited next to it, read on 26 October 2026. Where two pages of the same company disagree, both figures are shown. Directories, marketplace storefronts and other lists were used only to find names, never as a source for a company's facts, and a site that refused our tools was dropped rather than filled in from elsewhere.

Certificates were treated as claims until a number made them checkable. We looked for certificate, label and audit numbers in each page's text and in the captions of certificate images, and tried the public lookups: OEKO-TEX Label Check, Textile Exchange's certified-company search, the GOTS supplier database and WRAP's facility map. amfori BSCI audit reports are not published [43].

We did not visit, audit or order from any company. SEAMDANCE is the publisher and its row comes first, held to the same standard: only what its own pages state. The other seven follow in alphabetical order. No company paid to appear here, and inclusion is not an endorsement.

The companies, in their own words

Quoted text is each company's own wording, spelling included. Read the right-hand columns as much as the left: what a supplier does not publish is often the first thing to ask for in writing.

CompanyWhereWhat it publishes about swimwearCertificates claimed, and what the database showsWhat we could not findWho it suits
SEAMDANCE (publisher of this page)Xiamen; swimwear through its one-stop service, alongside its activewear programmes, at a partner factory named for each order [27][28]Chlorine-resistant nylon and PBT blends, quick-dry finishes, UPF protection, and recycled nylon "where a sustainability claim is needed"; stock programmes from 100 pieces per style [27], colours and sizes mixed [28]; custom 300–500 per style; the same sampling, fit and AQL 2.5 inspection standard as its activewear [27]No certification is claimed for SEAMDANCE. Certificates such as OEKO-TEX, GRS and BSCI are held by the mills and factories that make each order, with holder, scope and validity checked per project [28]A UPF rating or a chlorine test method on the swimwear page [27]; partner factory names and addresses, which are disclosed per order, not listed publicly [28]Brands adding swimwear to an activewear range who want it in the same order, and to the same inspection standard, as their leggings and bras
Hongxiu (Xingcheng Hongxiu Clothing)Xingcheng, Huludao, Liaoning: 10-8A Tiexi Road, Ningyuan Street [1]; factories also listed in Kazuo and Lingyuan, Liaoning [4]Minimums by service — "private label from 50 pcs per style per color, ODM from 100 pcs, and OEM from 300 pcs"; development samples $50 per style in 7–14 working days, bulk 28–35 days; 82/18 nylon-spandex or 85/15 polyester-spandex at about 200 GSM; three factories, more than 100 workers, up to 100,000 pieces a month [1]None named; color fastness to chlorine, sunlight and sweat tested "on request" [3]A lining specification; a UPF figure; any named certificate [2][3]Brands starting from stock or private-label styles at 50 per style per colour, with a published route to OEM at 300
Joy SportwearHumen, Dongguan, Guangdong: 5th Floor, Heshun Building, No. 3 Dongfang Shuiyun Road [6]Custom bikinis; "Our minimum order quantity is 50 pieces per style and color, available in 3 different sizes"; samples 7–10 days, bulk 25–35 days counted from payment [5]; established 2012 [6]; "UPF+ linings" among its design options [7]"OEKO-TEX®, GRS, and EC REP" named, no numbers [6]; GRS not checked: Textile Exchange's site refused our toolOne minimum — per style and colour in the FAQ, "per design" on the About page; one sample time (7–10 days or 7–15 working days) and one bulk time (25–35, about 30–35 or 30–40 days) [5][6][7]; fabric contentFirst runs of about 50 per style; confirm in writing whether the 50 is per colour or per design
MLY (Guangdong MLY Garment)Office at 3F, No. 6, East Lot, Dali Town Road, Nanhai District, Foshan, Guangdong [8]; a "new Dongguan factory of 8,000 sqm" in its 2023 timeline, with no address [9]Bikinis, one-pieces, men's and kids' swim [8]; four factories — "2 swimwear, 1 board shorts, 1 yoga wear" [9]; "Our standard MOQ is 50–100 pieces per style"; samples 3–7 days; bulk "around 45 days after sample approval" [10]ISO 9001, GRS, BSCI, SMETA, CE and OEKO-TEX shown as images only; the GRS image is captioned "GRS-Certificate-SEVNNA COMPANY", and the page does not say how that company relates to MLY; the captions "bsci250829" and "2710362A" match no public record we could query [11]A factory address; one bulk time (20–40 days on the home page, 20 days on the About page, about 45 days in the FAQ), one headcount (more than 500 or more than 100) and one monthly capacity (350,000 pieces or 200,000 sets) [8][9][10]Bikinis and board shorts at 50–100 per style from a group with several factories; get the sewing factory's address and the bulk time in writing
Shunhang SwimwearXingcheng, Huludao, Liaoning: factory on Outer Ring West Road; the footer reads "DALIAN SHUNHANG" [12]Bikinis, one-pieces, tankinis, kids' and men's swim, beach shorts and rash guards [12]; "Our MOQ is 200pcs/color/style for swimwear"; delivery "25~45 days after deposit payment and PP samples confirmed"; inline and final QC [13]; samples in 5–7 days when the fabric is in stock, $30 per style, returned on a bulk order [14]None named [12]Fabric content; chlorine, UPF or lining claims; a legal company name, or what the Dalian name refers to [12]Xingcheng-made bikinis, one-pieces and rash guards at 200 per colour per style
Welon (Welon Sport & Fashion Group)Business office in Panyu District, Guangzhou, and a Hong Kong address; "production plants in Foshan, China and Semarang, Indonesia" [15]Women's, men's and kids' swimwear, board shorts and rash guards; up to 2.5 million pieces a year [15]; PBT or chlorine-resistant spandex options [18]; a UPF 50+ surf shirt in 79% recycled polyester, 21% spandex, made "35-60 days after pre production sample is approved" [19]; AQL 2.5 named in an image caption [17]"Our garment factories are certified by BSCI, SEDEX, WRAP, GRS and ISO9001"; "Our fabric mills are certified by Oeko-Tex and GRS"; no numbers [16]; WRAP's map and Textile Exchange's search could not be queriedAny minimum; which plant, Foshan or Semarang, would sew an order; the test behind "UPF 50+" [15][19]Larger programmes that can be split between China and Indonesia, with a choice of PBT or chlorine-resistant spandex; ask for the minimum
YIFENG (Xingcheng Yifeng Garment Factory)Only address: 2001, Unit 1, Chuncheng Building, Sunquan Road, Fuyang District, Hangzhou, Zhejiang; the name, "Xingcheng Yifeng Garment Factory (Hangzhou Fuyang Yifeng Trade Co., Ltd.)", points to Xingcheng [20]"MOQ: 50-100/Order"; "Sample time 3-5 days"; production 7 days (ODM) or 10–15 days (OEM); "mostly imported recycled fabrics such as Carvico, ECONYL® and REPREVE®" [20]; about 1,600 m², "10 production line about 100 machines", about 100,000 sets a month [21]"GRS, OEKO-TEX®, GOTS, BSCI Certification" on the home page [20]; one image captioned "certificate" on the About page [21]; no numbers; the GOTS database could not be queriedA factory address; one sample time (3 or 3–5 days) and one bulk time (7, 10–15 or 10–20 days) [20][21][22]Quick-turn recycled-fabric bikinis from about 50 pieces; ask where they are sewn
YongTing (Dongguan Yongting Clothing)Wanjiang, Dongguan, Guangdong: 4C, Huatong Building, Yuetan Village, Pailouji [23]"Our minimum order quantity is usually 100 pieces"; production "2 to 6 weeks" from confirming the design; polyester, spandex and nylon [24]; 3,000 square metres, nearly 200 workers, 200,000 pieces of swimwear a month [25]Describes its factory as BSCI-certified and its bikini fabrics as OEKO-TEX certified; no numbers [23]A sample time; chlorine, UPF or lining claims; one experience figure — over 15 years on the home page, over 20 on the bikini page [23][26]Runs of about 100 pieces in a two-to-six-week production window; ask for the sample time

Swim construction, side by side

Fabric, chlorine and sun claims are published unevenly, and none comes with a named test method. Minimums and lead times are the supplier's own figures and should be confirmed on the quotation; where a company's pages disagree, every figure is shown.

CompanyFabrics and chlorine resistance statedUPF or sun claims statedMinimum statedSample and bulk time stated
SEAMDANCEChlorine-resistant nylon and PBT blends, quick-dry finishes, recycled nylon; no test method named [27]"UPF protection", with no rating or method [27]100 per style, colours and sizes mixed (stock); 300–500 per style (custom) [27][28]Stock samples 3–4 days; custom first sample about 7 days; bulk 25–30 days on stock styles with your branding, 6–8 weeks OEM, 7–9 weeks ODM [28]
Hongxiu82/18 nylon-spandex or 85/15 polyester-spandex, about 200 GSM; "Better chlorine and sunlight resistance" listed for polyester-spandex [2]; chlorine colour-fastness test on request [3]None stated50 per style per colour (private label), 100 (ODM), 300 (OEM) [1]Sample 7–14 working days; bulk 28–35 days [1]
Joy SportwearHouse fabrics or the buyer's own; no composition or chlorine claim [6]"UPF+ linings", with no rating [7]50 per style and colour, or 50 per design (two pages) [5][6]Sample 7–10 days or 7–15 working days; bulk 25–35, about 30–35 or 30–40 days (three pages) [5][6][7]
MLYMore than 500 fabrics, including recycled; no chlorine claim [8][10]None stated"Flexible", or 50–100 per style (two pages) [8][10]Sample 3–7 days (3 days on the About page); bulk 20–40 days, 20 days, or about 45 days after sample approval (three pages) [8][9][10]
ShunhangNot statedNone stated200 per colour per style [13]Sample 5–7 days with stock fabric [14]; bulk 25–45 days after deposit and PP sample [13]
WelonPBT: Carvico's Darwin, 100% polyester, or a local 48% PBT, 52% polyester; or LYCRA XTRA LIFE or creora highclo spandex [18]"UPF 50+" on a surf shirt in 79% recycled polyester, no method [19]Not statedBulk 35–60 days after pre-production sample approval, with materials in the warehouse [19]
YIFENGRecycled fabrics from Carvico, ECONYL and REPREVE; no chlorine claim [20]No UPF figure stated50–100 per order, or 50 on a product page [20][22]Sample 3 or 3–5 days; bulk 7 days (ODM or a trial order), 10–15 days (OEM) or 10–20 days (product page); a 40ft container in 50 days [20][21][22]
YongTingPolyester, spandex and nylon; no chlorine claim [24]None statedUsually 100 pieces [24]Sample not stated; production 2–6 weeks from confirming the design [24]

Chlorine resistance: what the claim should name

Pool chlorine attacks colour and strength, and each has its own evidence. For colour, ISO 105-E03 tests fastness to chlorinated swimming-pool water at 50 mg/l or 100 mg/l active chlorine for swimwear, and at 20 mg/l for beach robes and towels [29]; AATCC TM162, which tests colourfastness to chlorinated pool water, is related to it [30]. Chlorine also costs strength: in a 2024 study of polyamide- and polyester-elastane swim knits left in a chlorinated outdoor pool, breaking force fell by 12.4 per cent after 200 hours and by 65.7 per cent after 300 hours [31].

The suppliers here answer with fibre choices rather than test results. Welon offers PBT — Carvico's Darwin, "made of 100% polyester, totally chlorine proof", or a local fabric of about 48% PBT and 52% polyester — or chlorine-resistant spandex such as LYCRA XTRA LIFE or creora highclo [18]; LYCRA's own page says XTRA LIFE lasts up to ten times longer than ordinary spandex, without giving the test conditions [32]. Hongxiu's fabric guide lists "Better chlorine and sunlight resistance" for polyester-spandex rather than nylon-spandex, and its quality page offers colour-fastness tests to chlorine on request [2][3]. SEAMDANCE's page lists chlorine-resistant nylon and PBT blends, also without a method [27]. Ask for the report: the method, the chlorine concentration, the exposure time and the grade.

Lining and opacity when wet

None of the seven companies publishes a lining fabric, weight or colour on the pages we read. Joy Sportwear lists "UPF+ linings" among its design options, without a rating [7]; the others say nothing about linings. Yet the lining is what stands between a pale or thin shell fabric and see-through once the suit is wet and stretched over the body. Sun ratings face the same gap: AS/NZS 4399 rates material that is new, unstretched and dry [35].

Some tests do reproduce use. AATCC TM183 can measure specimens wet as well as dry [33], and UV STANDARD 801 tests clothing new, stretched, wet, after abrasion and after washing, requiring at least UPF 10 at every step [37]. No page here publishes an opacity check, so write the lining fabric, weight and colour into the tech pack, and look at the palest colourway wet and stretched before you approve bulk.

UPF claims and what stands behind them

Only Welon publishes UPF 50+, on a surf shirt in 79% recycled polyester and 21% spandex [19], and it names neither the test method nor the laboratory. SEAMDANCE's page offers "UPF protection" without a rating [27].

For swimwear the method matters more than usual. In the United States, ASTM D6544 sets standardised exposures to laundering, simulated sunlight and chlorinated pool water, simulating two years of seasonal use, before the fabric is measured with AATCC TM183 and labelled under ASTM D6603 [34][33]. AS/NZS 4399 classifies fabric at UPF 15, 30, 50 or 50+, and a claim for a whole product must also meet its body-coverage and label requirements [35]; in Europe, garments marked under EN 13758-2 carry "UPF 40+" [36]. Ask which standard the report used, whether the fabric was tested after chlorine exposure, and whether a fabric rating is being put on a garment that covers less of the body.

Recycled nylon and polyester claims

Recycled fibre runs through this set. YIFENG says it uses "mostly imported recycled fabrics such as Carvico, ECONYL® and REPREVE®" [20]; Welon lists a surf shirt in 79% recycled polyester [19], and MLY counts recycled fabrics among its swim fabrics [10]; SEAMDANCE offers recycled nylon "where a sustainability claim is needed" [27].

A fibre brand and a certificate are different evidence. ECONYL is a trademark of Aquafil [39]; REPREVE is made by UNIFI, which says its products carry a FiberPrint tracer that qualifies goods for its U-TRUST certification [40]. For GRS, Textile Exchange calls a supplier's scope certificate a first step that "does not verify that any particular product is certified"; the transaction certificate lists the shipment and whether the material is pre- or post-consumer [38]. None of the companies here mentions transaction certificates on the pages we read.

Certificate claims and where they can be checked

Every claim below appeared on a supplier's own page. No company printed a certificate, label or audit number in its page text; MLY's certificate page shows two reference-like strings only in image captions [11]. The third column says where a buyer can confirm a claim; the fourth says what we could confirm on 26 October 2026.

Claim as shownShown byWhere it can be checkedWhat we could confirm
BSCI certification or a BSCI audit passedWelon, YongTing, YIFENG; MLY as an imageamfori BSCI is "a verification, not a certification"; the report is shared with linked buyers on the amfori platform, not published [43]No audit reference in any page text; MLY's caption "bsci250829" cannot be looked up publicly
OEKO-TEX STANDARD 100, or OEKO-TEX fabricsYIFENG, Joy Sportwear; Welon and YongTing for fabrics; MLY as an imageLabel Check, by certificate or label number; certificates are issued for one year [42][41]Nothing: no number in page text. MLY's caption "2710362A" is not identified as an OEKO-TEX number, and Label Check could not be queried with our tools
GRSWelon (garment factories and fabric mills), Joy Sportwear, YIFENG; MLY as an image captioned "GRS-Certificate-SEVNNA COMPANY"Textile Exchange's certified-company search; a scope certificate does not prove a product is certified, so ask for transaction certificates [38]Not checked: Textile Exchange's site refused our tool
GOTSYIFENGThe GOTS certified-suppliers database [45]Not checked: its results load in the browser and could not be queried; no number published
WRAP, SEDEX or SMETAWelon (WRAP, SEDEX); MLY ("smeta" image)WRAP's facility map [44]; for SEDEX or SMETA, the audit report for the named siteNot checked: WRAP's map loads by script and returned no facilities to our tool
ISO 9001Welon; MLY as an imageThe issuing certification body's register, by certificate numberNot checked: no number published
CE and "EC REP"MLY ("ce" image); Joy Sportwear ("EC REP")The document itself: which product, which regulation and which issuerRecorded as stated; neither page says which product either covers
UPF 50+, or "UPF protection"Welon (UPF 50+); SEAMDANCE ("UPF protection")A test report naming the method — AATCC TM183 after ASTM D6544 conditioning in the US, AS/NZS 4399, or EN 13758 [33][34][35][36]No method or laboratory named
Chlorine resistanceWelon, Hongxiu; SEAMDANCEA report to ISO 105-E03 or AATCC TM162, stating the chlorine concentration [29][30]No method named; Hongxiu offers a chlorine colour-fastness test on request [3]

Quick answers

How was this list of swimwear manufacturers put together?

Each company has an English website that presents swimwear among its main products and gives a location in mainland China. Every figure is the company's own wording, read on 26 October 2026, with conflicting figures shown side by side. SEAMDANCE publishes the page and appears first under the same standard. It is not a ranking.

What minimum order do swimwear manufacturers in China publish?

In this set, most of the published figures fall between 50 and 100 pieces, and Shunhang publishes 200 per colour per style [13]. Hongxiu publishes three tiers — 50 per style per colour for private label, 100 for ODM and 300 for OEM [1] — and Welon publishes none. Check the unit: per style, per colour, per design and per order all appear.

How can I check a chlorine-resistance claim on swimwear fabric?

Ask for a test report that names the method, the chlorine concentration and the exposure time. ISO 105-E03 tests colour at 50 or 100 mg/l active chlorine for swimwear [29], and AATCC TM162 tests colourfastness to chlorinated pool water [30]. None of the companies here names a method; Hongxiu offers a chlorine colour-fastness test on request [3].

Can I trust a UPF 50+ claim on swimwear?

Only with a test report that names the method and the laboratory. In the US, ASTM D6544 first conditions the fabric with laundering, simulated sunlight and chlorinated pool water, and AATCC TM183 then measures it [34][33]; AS/NZS 4399 tests new, unstretched, dry fabric [35]. One company here publishes UPF 50+, and it names no test.

Where are swimwear manufacturers in China concentrated?

In Xingcheng, Liaoning: a China Daily opinion piece published in January 2026 says the city makes 170 million pieces of swimwear a year and one in every four swimwear items sold worldwide [46]. Two of the makers here are in Xingcheng and four in Guangdong; one trades under a Xingcheng name from a Hangzhou office [20].

What should a swimwear tech pack say about the lining?

The lining fabric, its weight and colour, and where it is used — full, front only or in the cups. No company here publishes a lining specification, and AS/NZS 4399 rates fabric new, unstretched and dry [35], so check the palest colourway wet and stretched before bulk.

Is recycled nylon swimwear certified?

Not because of a fibre name. ECONYL is Aquafil's trademark [39], and REPREVE goods carry UNIFI's FiberPrint tracer for its U-TRUST certification [40]. For GRS, ask for the transaction certificate covering your shipment; a supplier's scope certificate alone does not verify a particular product [38].

Is the address on a swimwear supplier's website where my order will be sewn?

Not always. Hongxiu lists factories in three places in Liaoning [4], Welon has plants in Foshan and in Semarang, Indonesia [15], and YIFENG gives only a Hangzhou office address [20]. Ask for the name and address of the site that will sew your order.

Sources

  1. Hongxiu — home page ("private label from 50 pcs per style per color, ODM from 100 pcs, and OEM from 300 pcs"; development sample $50 per style, 7–14 working days; bulk 28–35 days; 82/18 nylon-spandex and 85/15 polyester-spandex at about 200 GSM; three factories, more than 100 workers, up to 100,000 pieces a month; address in Ningyuan Street, Xingcheng; checked 26 October 2026)
  2. Hongxiu — fabric guide (82% nylon, 18% spandex or 85% polyester, 15% spandex; about 200 GSM, roughly 180–230; "Better chlorine and sunlight resistance" listed for polyester-spandex; checked 26 October 2026)
  3. Hongxiu — quality control page (in-process checks and a final inspection; optional lab tests for color fastness to chlorine, sunlight and sweat "on request"; checked 26 October 2026)
  4. Hongxiu — contact page (head office in Xingcheng; factories listed in Xingcheng, Kazuo and Lingyuan, Liaoning; checked 26 October 2026)
  5. Joy Sportwear — FAQ ("50 pieces per style and color, available in 3 different sizes"; sample 7–10 days, bulk 25–35 days, counted from payment; checked 26 October 2026)
  6. Joy Sportwear — About page (Humen address; established 2012; "50 pieces per design and you can modify the size"; sample 7–15 working days; bulk 30–40 days; "OEKO-TEX®, GRS, and EC REP" named; checked 26 October 2026)
  7. Joy Sportwear — swimwear manufacturing page ("Bulk production time is about 30-35 days"; "UPF+ linings" among design options; fabric tests for shrinkage, stretch, durability and colorfastness; checked 26 October 2026)
  8. MLY — home page (office in Nanhai District, Foshan; 4 factories, 8,000 m² of factory area, more than 500 employees, more than 350,000 pieces a month; sample 3–7 days, bulk 20–40 days; "Fast Sampling & Flexible MOQ"; checked 26 October 2026)
  9. MLY — About page (founded 2015; "four specialized factories (2 swimwear, 1 board shorts, 1 yoga wear)"; a "new Dongguan factory of 8,000 sqm" in 2023; more than 100 employees; 200,000 sets a month; "3-day sample turnaround, 20-day bulk production"; checked 26 October 2026)
  10. MLY — FAQ ("Our standard MOQ is 50–100 pieces per style"; sample 3–7 days; bulk "around 45 days after sample approval"; key processes "completed in our own factory"; checked 26 October 2026)
  11. MLY — certificate page (19 images; captions include "GRS-Certificate-SEVNNA COMPANY", "bsci250829" and "2710362A"; no certificate number in the page text; checked 26 October 2026)
  12. Shunhang Swimwear — About page (factory on Outer Ring West Road, Huludao City (Xingcheng); bikinis, one-pieces, kids' and men's swim, beach shorts and rash guards; "over a decade"; footer "DALIAN SHUNHANG"; checked 26 October 2026)
  13. Shunhang Swimwear — About Bulk ("Our MOQ is 200pcs/color/style for swimwear"; "25~45 days after deposit payment and PP samples confirmed"; inline and final QC; checked 26 October 2026)
  14. Shunhang Swimwear — About Sample (5–7 days when the fabric is in stock; sample fee $30 per style, returned on a bulk order; checked 26 October 2026)
  15. Welon — home page (business office in Guangzhou; "production plants in Foshan, China and Semarang, Indonesia"; up to 2.5 million pieces of swimwear a year; Hong Kong address; checked 26 October 2026)
  16. Welon — FAQ ("we have our own factory located in both China and Indonesia"; "Our garment factories are certified by BSCI, SEDEX, WRAP, GRS and ISO9001"; "Our fabric mills are certified by Oeko-Tex and GRS"; no numbers; checked 26 October 2026)
  17. Welon — manufacture page ("from initial, inline till final AQL 2.5 control" in an image caption; checked 26 October 2026)
  18. Welon — "Chlorine Resistant Swimsuit" article (Darwin P.B.T. by Carvico, "made of 100% polyester, totally chlorine proof"; local PBT of about 48% PBT, 52% polyester; LYCRA® XTRA LIFE™ or creora® highclo™ as alternatives; checked 26 October 2026)
  19. Welon — men's surf wetshirt product page (79% recycled polyester, 21% spandex; "UPF 50+" with no test named; "35-60 days after pre production sample is approved and materials ready in warehouse"; checked 26 October 2026)
  20. YIFENG — home page ("Xingcheng Yifeng Garment Factory (Hangzhou Fuyang Yifeng Trade Co., Ltd.)"; address in Fuyang District, Hangzhou; "MOQ: 50-100/Order"; "Sample time 3-5 days"; production 7 days (ODM) and 10–15 days (OEM); "mostly imported recycled fabrics such as Carvico, ECONYL® and REPREVE®"; "GRS, OEKO-TEX®, GOTS, BSCI Certification"; checked 26 October 2026)
  21. YIFENG — About page ("Factory area about 1600 m²"; "10 production line about 100 machines"; about 100,000 sets a month; "Sample Time: 3 DAY"; trial bulk order in 7 days; a 40ft container in 50 days including custom fabric and dyeing; one image captioned "certificate"; checked 26 October 2026)
  22. YIFENG — floral high-waist bikini set product page (spandex and nylon; MOQ 50 pcs; "Our bulk lead time is 10-20 days after Pre-production samples get approval"; checked 26 October 2026)
  23. YongTing — home page (Dongguan Yongting Clothing Co., Ltd.; address in Wanjiang, Dongguan; "For over 15 years"; factory described as BSCI-certified; bikini fabrics described as OEKO-TEX certified; checked 26 October 2026)
  24. YongTing — FAQ ("Our minimum order quantity is usually 100 pieces"; "2 to 6 weeks" from confirming the design; polyester, spandex and nylon; checked 26 October 2026)
  25. YongTing — About page ("spans 3,000 square meters and employs nearly 200 skilled workers"; 200,000 pieces of swimwear a month; checked 26 October 2026)
  26. YongTing — bikini page ("over 20 years of experience"; checked 26 October 2026)
  27. SEAMDANCE — swimwear page (private label swimwear "through our one-stop service, alongside our activewear programs"; chlorine-resistant nylon and PBT blends, quick-dry finishes, UPF protection, recycled nylon where a sustainability claim is needed; stock from 100 pieces per style, custom 300–500 per style; stock samples 3–4 days, custom first samples 7; the same AQL 2.5 inspection standard; the publisher's own page, checked 26 October 2026)
  28. SEAMDANCE — FAQ (stock programs from 100 pieces with mixed colours and sizes; custom 300–500 per style; bulk 25–30 days for stock styles with your logo, 6–8 weeks OEM, 7–9 weeks ODM; final inspection to AQL 2.5; certifications held by the mills and factories that make each order, holder, scope and validity verified per project; the partner factory named for each order; the publisher's own page, checked 26 October 2026)
  29. EVS-EN ISO 105-E03:2010 — colour fastness to chlorinated water (swimming-pool water) (50 mg/l and 100 mg/l active chlorine intended for swimwear, 20 mg/l for beach robes and towels; checked 26 October 2026)
  30. AATCC — TM162, colorfastness to water: chlorinated pool (related to ISO 105-E03; checked 26 October 2026)
  31. Polymers (MDPI) — Potočić Matković, Salopek Čubrić and Krstović, "The Impact of Chlorinated Water and Sun Exposure on the Durability and Performance of Swimwear Materials", 16(21) 3050, 2024 (polyamide- and polyester-elastane swim knits in chlorinated outdoor pool water for 200 and 300 hours; breaking force down 12.4 per cent after 200 hours and 65.7 per cent after 300 hours; abstract checked 26 October 2026 in Europe PMC)
  32. LYCRA — LYCRA XTRA LIFE fiber (chlorine- and UV-resistant spandex said to last up to ten times longer than ordinary spandex or elastane, in the company's own lab and pool testing, with conditions not published; checked 26 October 2026)
  33. AATCC — TM183, transmittance or blocking of UV radiation through fabric (specimens measured dry or wet; labelling specified in ASTM D6603; checked 26 October 2026)
  34. ASTM — D6544-25, preparation of textiles prior to UV transmission testing (standardised exposures to laundering, simulated sunlight and chlorinated pool water, simulating two years of seasonal use; used with AATCC TM183 and Specification D6603; checked 26 October 2026)
  35. Hohenstein — AS/NZS 4399 (UPF levels 15, 30, 50 or 50+; new, unstretched and dry materials tested; a claim for a whole product also needs the body-coverage and label requirements; checked 26 October 2026)
  36. Hohenstein — textile UV protection overview (garments under EN 13758-2 marked UPF 40+; checked 26 October 2026)
  37. UV STANDARD 801 — test requirements (clothing tested new, stretched, wet, after abrasion and after washing or cleaning, with at least UPF 10 at each step; checked 26 October 2026)
  38. Textile Exchange — Quick Guide to the RCS and GRS (a scope certificate "does not verify that any particular product is certified"; transaction certificates list the shipment and whether the material is pre- or post-consumer; checked 26 October 2026)
  39. ECONYL — home page ("ECONYL® is a trademark of Aquafil Spa"; checked 26 October 2026)
  40. REPREVE — home page (made by UNIFI; "REPREVE branded products include a proprietary FiberPrint® tracer, which qualifies goods for U-TRUST® certification"; checked 26 October 2026)
  41. OEKO-TEX — STANDARD 100 (every thread, button and accessory tested; certificate issued for one year; checked with the QR code or certificate number in Label Check; checked 26 October 2026)
  42. OEKO-TEX — Label Check (searched by certificate or label number, case sensitive; checked 26 October 2026)
  43. TÜV NORD — amfori BSCI verification ("a verification, not a certification"; the report is shared with linked buyers on the amfori Sustainability Platform; checked 26 October 2026)
  44. WRAP — Facilities and monitors (certified facilities shown on an interactive map; checked 26 October 2026)
  45. GOTS — certified suppliers database (results load in the browser; certification bodies still updating their data; checked 26 October 2026)
  46. China Daily — "Still Made in China, thanks to new tech in swimwear", opinion by Zhang Xiaobo, 5 January 2026 (Xingcheng makes 170 million pieces of swimwear a year, valued at 15 billion yuan; one in every four swimwear items sold worldwide; checked 26 October 2026)
How SEAMDANCE develops swimwear

Lining, chlorine resistance and the palest colourway settled before bulk, in the same order as the rest of your range.

Open the program
Catalogue / 2026

Sourcing styles for your line? The 2026 catalogue lists every ready-to-develop style — colorways, materials, quote list built in.