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Split torsos in red/blue bikini bottoms; text: traditional swim vs. swim that fits like undies: what's the difference??

January 24, 2026

Traditional Swimwear vs. Swimwear that Fits Like Underwear: What's the Difference?

Have you ever been so excited about a cute swimsuit, but then felt so defeated once it was on your body? You know - because of all the digging, pinching, and constant adjusting? This is a very common occurrence for most women, but we're here to tell you, it doesn't have to be this way!

onewith was born out of this same frustration. Our founder was trying on swimsuit after swimsuit, hating all of them, when she said out loud "why can't my swimsuit fit like my no-show undies?" That was her light bulb moment to create swimsuits that fit like underwear®.

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Traditional swimwear

These swimsuits are usually built with structure first, and comfort second (let's face it... last). 

That often looks like:

  • Thick elastic that squeezes your body
  • Stiff seams that dig in
  • Compression-heavy fits, meant to “hold you in”
  • Uncomfortable fit, especially when moving or sitting
  • Constantly needs adjusting 

If you’ve dealt with the dreaded pinching, digging, squeezing, red marks, or constant adjusting, it’s not your body. It’s the swimsuit construction.

Swimwear that fits like seamless underwear

Our beyond-seamless swim has the most flattering fit because we designed it with our patented fits-like-undies construction, so it's soft, flexible, and moves with you. We changed swimwear so women don't feel the need to change themselves!

That means:

  • No tight, bulky seams or elastic that dig and squeeze
  • Raw-cut, bonded edges that stay in place thanks to our inner grip strip
  • Edgeless and dig-free, like a second-skin
  • A confidence-boosting swimsuit fit that moves with you, not against you
  • Size-inclusive swimsuits for sizes XXS - 3XL
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Why It Matters

When your swimwear fits like underwear, you stop thinking about it. You're not constantly adjusting, you're not over-analyzing how it looks on your body. Instead, you're having the best time swimming, lounging, and just existing! 

Once you feel the difference, there's no going back. Are you ready to ditch traditional swim and try our edgeless swimsuits? Shop our swim that fits like undies here, and be sure to follow us on IG to keep up with all things onewith

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