Pool or ocean — different fabric
Chlorine degrades standard elastane. For pool wear we spec chlorine-resistant elastane or PBT polyester; for ocean and resort, nylon/elastane feels better. We'll ask which before quoting.
Custom swimwear, made to your design — bikinis, one-pieces, swim shorts and rash guards in performance fabrics, with full branding and worldwide delivery.
Collective Studio makes bikinis, one-pieces, swim shorts and rash guards in Narayanganj, Bangladesh, from 150 pieces per style and colourway, 40–50 days' production after sample approval, shipped DDP. About 70 days from order to your door by air. Fabric follows where the garment is worn: PBT polyester or chlorine-resistant elastane for pools, nylon for resort wear, with lining and chlorine-resistant elastic so pieces stay opaque wet.
Or message the factory directly: WhatsApp +880 1980 055026 · hello@collectivestudioltd.com · Homaira replies within one business day.



Made by our own team in Narayanganj. See the floor ↓Client reviews on Google ↗GOTS certificate RSC 9687 →

Short answer: we cut and sew bikinis, one-pieces, swim shorts and rash guards on our own floor in Narayanganj, Bangladesh, from 150 pieces per style and per colourway. The stretch swim fabric comes from partner mills; all-over prints are sublimated in our own building. Sampling takes about 10 days, then 40 to 50 days' production after approval, plus freight.
The question that decides your swimwear fabric is where it's going to be worn, and most brands don't get asked it. Standard elastane degrades in chlorine — a pool-worn bikini in ordinary nylon/elastane will start to bag out and lose recovery within a season. If your customer swims in pools, you want either a chlorine-resistant elastane or a PBT polyester construction, which is inherently chlorine-proof because the stretch comes from the polymer itself rather than an added elastomer. For ocean and resort wear, standard nylon/elastane is fine and feels considerably nicer against the skin.
Nylon versus polyester is the other real trade-off. Nylon is softer, has better drape and a more luxurious hand — it's what most premium swim brands use. Polyester holds colour better under UV, resists chlorine better, and dries faster, but never feels quite as good. Recycled nylon (regenerated from waste including reclaimed fishing nets) is available and performs essentially identically to virgin nylon, which makes it one of the easier sustainability swaps in apparel — unlike a lot of "eco" substitutions, you don't give anything up.
Two construction points that matter more in swim than anywhere else: lining isn't optional if you care about opacity when wet — fabric that looks opaque dry can become transparent wet, and this is the single most common swimwear complaint. And the elastic in leg and neck openings needs to be chlorine-resistant too; there's no point specifying chlorine-proof shell fabric and then using standard rubber elastic that perishes first. We make bikinis, one-pieces, swim shorts and rash guards, with sublimation printing for all-over custom patterns.
| Fabric | Best for | In pool water | Takes a sublimation print? | Check before bulk |
|---|---|---|---|---|
| Nylon/elastane | Resort and ocean wear; the softest hand | Standard elastane breaks down in chlorine | No | Wet opacity with lining; recovery after stretch; colour fastness to sea water (ISO 105-E02) |
| Recycled nylon/elastane | As nylon, with a recycled-content claim | As nylon | No | GRS or RCS paperwork covering your lot before any recycled claim goes on the label; the same wet tests as nylon |
| Polyester/elastane | Beach, training and multi-print ranges | Holds up considerably better than nylon | Yes, printed onto white base cloth | Colour fastness to chlorinated water (ISO 105-E03) if sold for pools; lightfastness (ISO 105-B02) on bright shades |
| PBT polyester | Pool and lap swimming | Chlorine-resistant: the stretch comes from the polymer itself | Polyester-based; confirm the base cloth with the mill | ISO 105-E03 at a swimwear concentration; stretch and recovery on a sewn sample |
| Chlorine-resistant elastane blend | Pool wear where a softer hand is wanted | Holds up better in chlorine than standard elastane | Depends on the shell fibre | The mill's spec sheet naming the elastane type; ISO 105-E03 |
| Four-way stretch tricot lining | Under the shell wherever the suit must stay opaque wet | Specify chlorine resistance to match the shell | Not printed | Stretch matched to the shell so it does not pucker; wet opacity on a sewn sample |
| Mesh liner | Men's swim shorts | Specify for pool use if the shell is | Not printed | Comfort at the leg opening; how it sits once wet |
Chlorine degrades standard elastane. For pool wear we spec chlorine-resistant elastane or PBT polyester; for ocean and resort, nylon/elastane feels better. We'll ask which before quoting.
Fabric that's opaque dry can go sheer wet — the most common swimwear complaint. Proper lining is specced in, not treated as an upgrade.
Regenerated nylon performs essentially identically to virgin — one of the few sustainability swaps where you give nothing up on hand feel or durability.
Sublimation printing on polyester-based swim fabric for seam-to-seam patterns with no print boundary.
Swimwear is a knit cut-and-sew job, which is what our floor does. We do not knit or dye swim fabric ourselves: the stretch shell and lining come from partner mills we specify and inspect but do not own, and a solid colour arrives from the mill as a dye lot per colourway. Cutting, sewing, sublimation printing of all-over patterns, finishing, checking and packing happen in our own building in Narayanganj.
Two things are best settled at quote stage, before any fabric is ordered: which tests your retailer will ask for, and exactly which panels are lined. Both decide which cloth is bought and how much of it, so settling them after cutting means reordering fabric and starting the cut again.
A swim fabric can pass a mill's general data sheet and still fade, bleed or go sheer in use. These are the tests worth naming in your spec, and when each one matters. A result describes the cloth that was tested, so ask for it on your production lot. On UPF, ARPANSA, which runs Australia's UPF testing service, puts it plainly: many materials show significant batch-to-batch variation in UPF rating, so the material tested should be the actual production material.
| Test | What it measures | When to ask for it |
|---|---|---|
| ISO 105-E03 | Colour fastness to chlorinated (swimming-pool) water. Active chlorine at 50 and 100 mg/l is for swimwear; 20 mg/l is for accessories such as beach robes and towels | Any piece sold for pool use |
| ISO 105-E02 | Colour fastness to immersion in sea water | Resort and ocean ranges |
| ISO 105-B02 | Colour fastness to artificial light (lightfastness) | Bright or saturated shades, or when a retailer asks for a rating |
| UPF to AS/NZS 4399:2020 | Ultraviolet protection of the material, rated 15, 30, 50 or 50+ | Before a rash guard or swim top carries a UPF claim |
| Wet opacity check | Whether the lined, sewn garment stays opaque when wet | Every swim style, at sample stage |



Wonderful people to work with — very professional and knowledgeable, also accommodating to the needs of their customers.
I have had a very good experience with this company. They are very friendly, professional, and provide fast service. They speak fluent English, which makes communication very easy. The quality of their manufacturing is excellent. I have no doubt in recommending this company to anyone looking for a reliable manufacturing partner in Bangladesh.
Collective Studios under the direction of Mr Jamish and his daughter Homaira represent the future of RTW production in Bangladesh. A thorough approach to detail governed by a genuine standard of quality. Masters of and partners in the process!
Swimwear is priced from two fabrics rather than one, plus elastic and hardware that have to survive chlorine, salt and sun.
Nylon/elastane, polyester/elastane, PBT and recycled nylon are all bought by the kilo at different rates, and swim knits with high elastane content cost more per kilo than any cotton cloth. Nylon carries a higher rate for its hand feel; PBT and chlorine-resistant elastane cost more again for pool durability. Recycled nylon prices close to virgin.
A lined swimsuit consumes two fabrics: the shell and a four-way stretch tricot lining across every area that must stay opaque when wet. That roughly doubles the cloth in a one-piece and adds a layer to every seam, so a lined garment costs more than an unlined one in fabric and in sewing minutes.
Leg, neck and underarm openings are finished with elastic bought in by the metre, and the chlorine-resistant grade costs more than standard rubber elastic. It is a bought-in trim with a supplier minimum, so on a small run in several styles the elastic order can exceed what the garments actually use.
A solid-colour swim fabric is a dye lot per colourway, with mill minimums. Sublimation prints an all-over pattern onto white polyester base cloth and is priced by the metre printed, so it removes the dye-lot problem for multi-design ranges but only works on polyester-based shells, not on nylon.
Bikini tops and one-pieces carry removable cups, hook-and-eye closures, rings, sliders and adjusters, each a bought-in component with its own minimum and a hand operation to fit. A four-piece bikini set with hardware is more operations than a rash guard, and the labour line reflects it.
Yes: bikinis, one-pieces, swim shorts and rash guards from 150 pieces per style, per colourway. In swimwear the minimums you meet first are the ones behind the cloth and trims: a solid swim fabric is a dye lot per colour with the mill's own minimum, and chlorine-resistant elastic and bikini hardware are bought-in trims with supplier minimums. The simplest way to keep a first range lean is fewer colourways per style. For a multi-design range, an all-over pattern sublimated onto white polyester base cloth is priced by the metre printed and removes the dye-lot minimum, though each design is still 150 pieces and it only works on polyester-based shells. Shell fabric, lining, elastic, hardware and chlorine resistance are all specified before cutting. Because all of that is agreed once and carried into every reorder, second runs are considerably quicker. Expect the first sample round to take longer than on a jersey garment. The MOQ calculator totals your mix.
Swimwear is cut and sewn from stretch fabric, and most of the decisions are made before anything is cut. First the shell is chosen by where it will be worn: PBT polyester or chlorine-resistant elastane for pools, nylon/elastane for resort. The pattern is then matched to that fabric, because different fabrics stretch differently and a pattern cut for one will not fit correctly in another. Solid colours come from partner mills as a dye lot per colourway; all-over prints are sublimated onto white polyester in our own building, printed flat with the artwork laid out against the pattern pieces. Four-way stretch tricot lining, chlorine-resistant elastic at the leg and neck, and any cups or hardware are specified next. The pieces are then cut and sewn on our own line in Narayanganj, where swim knits behave differently under the needle than cotton. Walter Meyer's QC checks opacity wet as well as dry, and orders ship DDP worldwide.
Because a swimsuit is priced from two fabrics rather than one, plus elastic and hardware that have to survive chlorine, salt and sun. Swim knits with high elastane content cost more per kilo than any cotton cloth, and PBT or chlorine-resistant elastane costs more again for pool durability. Lining means a four-way stretch tricot under the shell, which roughly doubles the cloth in a one-piece and adds a layer to every seam. Leg, neck and underarm openings take chlorine-resistant elastic, which costs more than standard rubber elastic and carries a supplier minimum. Bikini tops and one-pieces add removable cups, hook-and-eye closures, rings, sliders and adjusters, each bought in and fitted by hand, so a four-piece bikini set with hardware is more operations than a rash guard. Solid colours add a dye lot per colourway with mill minimums. We do not publish a price list: we quote each style and colourway from your spec.
The fabric you specify decides this, so choose deliberately rather than by default — the two common options age very differently in a pool. Standard nylon-elastane degrades relatively quickly in chlorinated water — the elastane breaks down, the fabric goes slack and slightly transparent, and a suit worn regularly in a pool can lose its shape within a season. Polyester-elastane holds up considerably better, and polyester with PBT or a chlorine-resistant elastane better still; that is what competitive swimwear uses. The trade-off is hand feel, since nylon is softer. If your customer is a pool swimmer, specify chlorine-resistant and say so on the label — it is a genuine selling point. If the range is resort and beach, standard nylon is fine and feels nicer. Tell us the use case and we will spec it accordingly.
Nylon for feel, polyester for durability, and where the suit will be worn decides between them. Nylon has the softer hand and better drape, which is why most premium swim brands use it, and it suits resort and ocean wear. Polyester holds colour better under UV, resists chlorine better and dries faster, but never feels quite as soft. For pool wear there is a specialist polyester, PBT, which is inherently chlorine-proof because the stretch comes from the polymer itself rather than an added elastomer. On cost, nylon carries a higher per-kilo rate for its hand, and PBT or chlorine-resistant elastane costs more again. Two things can settle it for you. An all-over sublimated print only works on a polyester-based shell, not on nylon. And if sustainability matters, recycled nylon, regenerated from waste including reclaimed fishing nets, performs essentially identically to virgin nylon and prices close to it. Tell us where your customer swims.
Yes, wherever the suit must stay opaque when wet. Fabric that looks opaque dry can become transparent in the water, and that is the single most common swimwear complaint, so on bikinis and one-pieces we spec lining in rather than treat it as an upgrade. We use a four-way stretch tricot lining matched to the shell's stretch, because a lining that stretches less than the outer fabric will pucker or restrict. It also improves the feel against skin and helps the garment hold its shape. Men's swim shorts usually take a mesh liner instead. Lining a one-piece roughly doubles the cloth and adds a layer to every seam, so it costs more in fabric and sewing minutes than an unlined suit. Skipping it saves money, but it is the most visible corner-cut in swim, because a customer notices the moment the suit gets wet. Tell us which areas to line and we quote it for your order.
All-over patterns, repeats and placement prints, yes — on polyester-based swim fabric. We sublimate, which puts the design inside the fibre with no hand feel and lets a pattern run across seams without breaking. Sublimation does not work on nylon, so the print decision is a fabric decision: polyester holds colour better under UV and resists chlorine better, while nylon has the softer hand. A print is priced by the metre printed onto white base cloth, which removes a solid colour's dye-lot minimum, though each design is still 150 pieces. The thing worth knowing early is that a true all-over pattern is a cut-and-sew job: the fabric is printed flat and the garment assembled afterwards, so the artwork has to be laid out against the pattern pieces before cutting. That is done once and reused. Send us the repeat as a vector file with the tile dimensions and we will tell you honestly how it will behave at garment scale.
Knit. Our floor cuts and sews knitwear only, so the swim shorts we make are cut from stretch knit fabric, usually a nylon or polyester blend with elastane, and sewn to your pattern from 150 pieces per style and per colourway. That suits a fitted swim short with some give, and a polyester-based cloth also takes an all-over sublimated print. We also make board-style knit shorts for beach ranges. Classic woven board shorts and crisp, non-stretch swim trunks are a different construction, and we do not make them on our floor. If your range needs them, our sister buying house, CMB Sourcing Ltd, a separate company in the same industrial area, can take them as a separate order if they fall within its range. Men's swim shorts usually take a mesh liner rather than a tricot lining. Tell us the length, fit and fabric you have in mind and we will say which route fits.
Everything a jersey tech pack has, plus the details that only matter once a garment is worn wet and stretched. State the use first, pool, ocean or resort, because that sets the shell fabric. Then give the shell's fibre content including the elastane type, the lining and exactly which panels it covers, and the elastic at each opening with its width and whether it is chlorine-resistant. Swim patterns are usually cut smaller than the body so the suit holds close when wet, so give finished measurements laid flat and the stretch you expect at bust, waist and hip. List cups, rings, sliders and clasps with their sizes and finish, and say which pieces are removable. For a print, send the vector file and the tile size. Name any test your retailer needs, such as ISO 105-E03 for chlorine. Our tech pack guide covers the rest, and if you have no tech pack, we can build one with you.
Trade and regulatory details on this page last verified 30 July 2026. Tariff and compliance terms change — ask us to confirm the current position for your order.
Whether it’s a large bulk or wholesale run or your first batch of 150, send a sketch, a reference, or a sentence. We’ll reply within one business day with fabric options and an indicative price.
Or message the factory directly: WhatsApp +880 1980 055026 · hello@collectivestudioltd.com · Homaira replies within one business day.