tomboyx | Premium Underwear for All Day Comfort. Fit for You.

Swim 6" Unisuit

Swim 6" Unisuit - Main image
$74.25 $99 In stock

Category: swimwear

Reveal an aquatic surprise with our water-activated fabric. When dry, black keeps its secrets hidden. But splash some water on it, and watch as gray jellies emerge.

How It Works

Our innovative color-changing technology responds to water contact. The moment moisture hits the fabric, the previously invisible jellyfish print transforms from black to gray. Once dry, the fabric returns to its sleek, all-black appearance—ready to surprise again and again.

A tbx classic. Fully-lined front for increased support and coverage. Unisuit features a full length zip front making it easy to get on and off. Zipper locks into place so you can dial in your personal look.

Sustainability note: We recycle 15 water bottles to make each 6" unisuit

  • Snug fit
  • 6" inseam
  • UPF 50
  • Anti-chafe seams
  • Shell: 80% recycled polyester; 20% spandex
  • Lining: 88% polyester, 12% spandex
  • OEKO-TEX® Certified
  • Inclusive sizing from XS-6X
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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Ellie T. ★★★★★

I’ve had this unisuit for two weeks now and the dry-to-wet reveal still makes me grin every time I step into the pool. The fabric feels sturdy enough for laps but light for lounging, and the jellyfish pattern pops exactly as shown. Just wish the color change lasted a bit longer after I towel off.

Andrew ★★★★★

The water-activated print is such a fun gimmick—wore it to the pool and the gray jellies popped right out on my first splash. Fabric dried quick and kept its shape all afternoon, so no complaints here.

Timothy Z. ★★★★★

Took it to the beach and dripped some seawater on my shoulder—the gray jellies appeared out of nowhere, which got a genuine laugh from my friends. It’s a clever little surprise that makes the suit fun without being gimmicky, and the fabric feels just right for swimming.