The Best Fabrics for DIY Swimwear (and Where to Get Them!)

Article published at: Apr 25, 2025 Article author: Fabric Team Article tag: best fabrics for swimwear
The Best Fabrics for DIY Swimwear (and Where to Get Them!)
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Creating your own swimwear is an exciting project, but choosing the right fabric is key to getting a comfortable, stylish, and long-lasting swimsuit. Whether you’re sewing a bikini, one-piece, or rash guard, the fabric you choose will determine how well it fits, stretches, and holds up to all your activities.

What to Look for in Swimwear Fabric

Swimwear fabrics need to be:

  • Stretchy: Look for at least 50% four-way stretch to ensure a snug, comfortable fit.
  • Quick-drying: Fabrics that hold moisture will feel heavy and uncomfortable.
  • Durable: Strong fibres prevent sagging and wear. 

Top Fabrics for Swimwear

Nylon Spandex (Polyamide Spandex)

If you’re looking for a classic, go-to swim fabric, this is it! Nylon spandex is soft, stretchy, and fits like a dream. It moves with your body and gives that smooth, second-skin feel—perfect for bikinis, one-pieces, and even swim leggings.  

  • Pros: Soft, lightweight, and dries quickly
  • Cons: Slightly less chlorine-resistant than polyester blends
  • Best for: Bikinis, one-pieces, swim leggings

Our Pick? Swim Basic Solid | Dewy Blue

  • Content: 80% Nylon | 20% Spandex
  • Width: 150 cm | 60”
  • Weight: 200 gsm | 7 oz
  • Stretch: 4-way | 80-90% cross-grain and straight-grain

Polyester Spandex 

If you’re planning to swim a lot—as in, lap after lap in the pool or back-to-back beach days—this is the fabric you need. Polyester spandex holds up like a champ against chlorine and UV rays, meaning your swimsuit will stay vibrant and stretchy for the long haul.

What we’d grab? Swim Print | Porcelain Rhapsody. This print has such a soft romantic vibe and just the right amount of stretch to keep things comfy. 

  • Why you’ll love it: Long-lasting, fade-proof, and feels great against the skin.
  • Keep in mind: It’s not as silky-soft as nylon, but it makes up for it with durability.

Textured Swim Fabrics

Want to take your DIY swimwear to the next level? Textured fabrics are where it’s at. Whether it’s ribbed, waffled, or jacquard, these fabrics add a unique, high-end look to your swimsuit.

What we’re obsessed with? Swim Basic Rib | Marine. Navy is a timeless, elegant color that never goes out of style.

 

  • Why you’ll love it: Looks stylish, fits like a glove, and makes your DIY swimsuit feel designer-level.
  • Pro tip:  Ribbed swim fabric provides amazing compression by hugging the body with its structured texture, creating a flattering and supportive fit.

Don’t Forget the Lining! 

No one wants a see-through swimsuit, right? For a pro finish, always add a good lining. It keeps things secure, adds comfort, and makes sure your swimsuit lasts! 

What we’d use? Swim Lining | Nude . It’s lightweight and stretchy enough to move with you.

  • Why you’ll love it: Gives your swimsuit that polished, high-quality feel.
  • Pro tip: Use Power Mesh if you're looking for tummy control in a one-piece!

Where to Buy High-Quality Swimwear Fabrics

At Fabric + Flow, we offer a curated selection of high-performance swimwear fabrics designed for DIY creators. Whether you’re making a classic one-piece or an on-trend bikini, our fabrics are handpicked to provide the best fit, durability, and style.

Explore our Swimwear Fabric Collection or check out our Swimwear Sewing Kits for everything you need in one place!

 

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