Shark Tank Swimsuits Like Underwear – onewith

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our shark tank journey

our viral swimsuits made a splash on Shark Tank, Season 16 Episode 9 — and we scored a deal with two Sharks! watch on ABC.com or Hulu.

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the magic of wearing onewith

see it on, IRL

Size: M

Woman in straw hat and mauve swimsuit sitting at the pool edge reading a book, towel and snacks beside her. — Size: S + M

Size: 2XL

Woman in a black bikini sitting on a sandy beach, leaning on one arm and looking down. — Size: S + M

Front view of blue onewith two-piece swimsuit on plus-size model with knot-front top and raw-cut bottoms at indoor pool — Size: L

1 FREE exchange on eligible US orders

size inclusive (XXS-3XL)

patented, US Patent No. 12,357,039

hi! i'm hayley, founder of onewith.

we’re so happy you discovered our swim that fits like undies on Shark Tank; welcome to whole new kind of swimsuit that is better-than-seamless, and truly onewith your body. thanks for supporting my female-founded & led small business!

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5.0/ 5 50k+ women who have gone edgeless

What people are saying

Front view of Merritt Dipped Cheeky black bikini bottoms and triangle top on a plus-size model, raw-cut second-skin fit — These are exactly what I’ve been looking for my whole life. I love the way I look in seamless underwear and always felt like I looked smushed in a regular swim bottom. This fits PERFECTLY

Jillian M.

Verified Buyer

Back view of Merritt Dipped Cheeky Bikini Bottom in blue showing raw-cut, no-show underwear fit and cheeky coverage on white background | alexhakim16 / M — Was very skeptical on the fit, but these truly do feel like your no show underwear!

Maritza R.

Verified Buyer

Rear view of Woodmont bikini bottom showcasing high-cut cheeky coverage and seamless black fabric on white background — I probably have close to 100 bathing suits and NONE have the fit that these do!! They fit like they were custom-made and don’t need adjusting every time I get out of the water!

Amanda F.

Verified Buyer

Side view of Kittery Classic Triangle Bikini Top showing raw-cut no-show fit and adjustable neck and back ties | alexhakim16 / S — My soft bits don’t spill. I’m comfortable and I look great. Exactly like my best of pair of underwear! It’s amazing

Janet R.

Verified Buyer

Front of Jennings V-Cut High-Waisted Bikini Bottom showing V-front, raw-cut edgeless finish and inner grip strip | ariellamayamendes / XL — I’m obsessed, genuinely the best fitting bathing suit bottoms I’ve ever owned. Highly HIGHLY recommend! I am 5’4 ,145lbs and I got a size medium :)

Kylie B.

Verified Buyer

Three women sitting on a seawall facing the water, wearing blue and black swimsuits, showing diverse body types.

“we changed swimwear so that

women don't feel the need to

change themselves.”

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Shop Tops

back shot of model wearing onewith's woodmont bikini bottom in cove — Shop Bottoms

model wearing Bellows Plunge High-Cut One Piece in cherrydip — Shop One Pieces

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Front view of Foxon Multi-Way Bandeau bikini top in Cove blue on model showcasing smooth, no-dig second-skin fit with porch background; model holds sign reading follow us @onewithswim — @onewithswim

Front view of Foxon Multi-Way Bandeau Bikini Top with matching black high-rise bottoms showcasing knot-front bandeau top and high-rise fit on a model against a plain light wall — @itsmisslys

Reclining view of Foxon Multi-Way Bandeau bikini top in black showing adjustable multi-way straps and seamless, no-dig fit on a model against a rocky shore — @ahmeimae

Three-quarter view of Hampton bottom in black on a model showcasing high-rise, full-coverage fit with raw-cut edges at poolside — @traceydoes_

Three-quarter view of Foxon Multi-Way Bandeau bikini top in Cove brown showing seamless raw-cut fit on model with hibiscus background — @ivana_ferro