Journal / Fabric & Care
What Is Your Swimsuit Really Made Of?
Start with two different questions: what fibers are in the fabric, and how is the surface constructed? Composition and texture work together, but they are not the same thing.
The short answer: a label tells you the composition, such as nylon and elastane or polyester and elastane. Your hand feels the construction: smooth or textured, compact or airy, light or substantial. You need both pieces of information to understand a swimsuit.
First: read the composition
Most modern swimwear begins with a main fiber that forms the body of the fabric. Elastane, also called spandex, may then be added to provide stretch and recovery. Four compositions appear regularly across swim and swim-inspired clothing.
Nylon / polyamide + elastane
Nylon, also called polyamide, is often selected for its soft, smooth handfeel and close relationship with the body. Elastane gives it stretch, recovery and a secure fit. This combination can be used for both fashion and active swimwear.
The percentages do not reveal everything. Ordinary nylon and elastane can share the same label as a more considered fabric made with ultrafine or functional yarns. Yarn quality, knit density, finishing and garment construction determine how refined, breathable and supportive the finished suit feels.
Polyester + elastane
Polyester forms the base of many fashion and performance swimsuits. It is widely used for color retention and durability, while elastane adds body-following stretch. Depending on the yarn and knit, the surface may be smooth, ribbed, brushed or crinkled.
100% polyester
Some training suits use polyester without elastane. Their give comes from the knitted construction rather than a stretch fiber. They often feel firmer and less sculpting than elastane blends, but can be a practical choice for frequent pool use where durability is the main priority.
100% cotton
Cotton can appear in knitted, crochet, heritage or swim-inspired pieces, especially when softness and a natural handfeel matter more than speed. Untreated cotton is highly absorbent and has limited natural elastic recovery, so it can become heavier, cling differently and dry more slowly after entering the water. For that reason, it is less common in technical or active swimwear unless the fabric has been specially engineered.
Second: feel the surface
Composition tells you which fibers are present. Surface and construction tell you how those fibers have been knitted or finished. The most useful everyday distinction is between a smooth fabric and a textured fabric.
Smooth: clean, controlled and streamlined
A smooth surface has little or no raised texture. It is common across nylon/elastane, polyester/elastane and some 100% polyester swim fabrics. Because there are fewer dimensional ridges, water can move across the surface cleanly; the exact drying speed still depends on fiber, knit density, thickness and finish.
Smooth stretch fabrics are usually developed in graded sizes such as XS to XL. This is not simply because they “do not stretch enough.†It is because support, coverage, torso length and seam position depend on controlled tension. Different sizes let the designer keep those relationships intentional across different bodies.
The clean surface also becomes a strong design canvas. Color blocking can define the body, panel lines can support movement, and prints can carry a graphic idea without competing with a raised texture.
Textured: dimensional, flexible and expressive
Textured swimwear includes ribbed, puckered and crinkle surfaces. “Crinkle†describes the construction and appearance, not a fixed composition: it may be made with polyamide/elastane, polyester/elastane or another blend.
Specialist tubular or high-stretch crinkle knits can expand and contract across a broad range. This is why some well-known crinkle collections are sold as one size or “unsized.†It is a property of the engineered knit, not a promise that every textured swimsuit will fit every body equally well.
Classic crinkle fabrics are usually designed around adaptability, sculpting texture and leisure styling rather than competitive hydrodynamics. Their dimensional surface and fabric bulk may hold water differently from a smooth, water-repellent performance fabric. That does not make every textured suit slow or heavy; it means texture alone should never be treated as a performance claim.
Where does Leda Sport sit?
Leda Sport works with a smooth, size-specific fabric system: 80% functional ultrafine nylon and 20% elastane. The nylon is chosen for a cool, smooth handfeel, breathability and efficient drying. The elastane supplies four-way stretch and recovery so the garment can stay secure through swimming and more active water sports.
We grade our suits by size because we want fit to be deliberate. Coverage, bust placement, torso length and support should not be left entirely to how far one fabric can stretch. A customer should be able to choose the tension and coverage that work for her body.
Our design language on a smooth surface
A smooth fabric asks the cut and color to do more of the visual work. Leda Sport uses clean color blocking, considered panel placement and occasional prints to create shape and energy. Our language is minimal without being quiet, elegant without becoming delicate, and unmistakably athletic without looking like a conventional training uniform.
Clear silhouettes and purposeful lines, without decoration that interferes with movement.
Balanced coverage and proportion that feel polished in and out of the water.
Color blocking and panel lines that make the body look active, alert and alive.
Graded fit that treats support, coverage and torso length as design decisions.
A quick way to choose
Ask these questions before the color
- Will I be training, moving actively or mainly relaxing by the water?
- Do I want a precise graded fit, or the flexible adaptability of an unsized construction?
- Does the label show nylon, polyester, elastane, cotton or a blend?
- Does the surface feel smooth and streamlined, or dimensional and textured?
- How does the fabric recover after I stretch it gently?
- What do the lining, seams and panels add to support and coverage?
Material notes
Fiber and moisture terminology is referenced against The LYCRA Company and Cotton Incorporated. Examples of specialist one-size crinkle construction are drawn from the brands' own explanations by Hunza G and bond-eye. Hydrodynamic references follow Speedo's performance-fabric guidance. Always check the composition, intended use and care label of the individual garment.