Free U.S. Shipping on orders over $100; easy returns
International Shipping now available!
[Ksenia XS]
[Ksenia XS]
[Ksenia XS]
[Ksenia XS]
[Vitoria XL]
Swim Straight One-Piece in Black
  •  of Swim Straight One-Piece in Black [Ksenia XS]
  •  of Swim Straight One-Piece in Black [Ksenia XS]
  •  of Swim Straight One-Piece in Black [Ksenia XS]
  •  of Swim Straight One-Piece in Black [Ksenia XS]
  •  of Swim Straight One-Piece in Black [Vitoria XL]
  •  of Swim Straight One-Piece in Black
[Ksenia XS] [Ksenia XS] [Ksenia XS] [Ksenia XS] [Vitoria XL] Swim Straight One-Piece in Black

Swim Straight One-Piece in Black

Rated 4.3 out of 5
Based on 42 reviews

Negative. Does. Swim. 


A figure flattering one piece featuring a high leg, cheeky bum, and open back. Our ultra smoothing and supportive stretch nylon keeps it all in place. 

Free U.S. shipping on orders over $100. Easy returns.

Fit

  • Size Chart
  • Use this as a guide. Preference is a huge factor — with a one piece, sizing can vary based on the length of your torso, in addition to your overall frame. If you're taller or have a proportionally longer torso, you may want to size up. 
  • Ksenia is 5'9", dress size 2, wearing our size XS

Fabric + Care

  • Size Chart
  • Ultra smoothing stretch nylon hugs the body like gentle shapewear
  • Double layered for extra support 
  • Features a straight neck, thin cami straps, and open back
  • Retro leg hits high on the hip
  • Cheeky coverage bum
  • 50% Nylon and 50% Elastane
  • Lining: 80% Nylon and 20% Elastane
  • Hand wash, dry flat

FAQ

  • All full-priced, unworn items, with tags attached and in their original packaging are eligible for return or exchange within 30 days of placing your order.
  • Please note, packs must be returned in full. We do not accept partial returns of packs.
  • Want to know our full returns policies? Here you go.
  • Want more info about shipping, materials or care instructions? Here!

    Q’s on fit or sizing? Email us at hello@negativeunderwear.com
average rating 4.3 out of 5
Based on 42 reviews
  • 5 Stars
    27 Reviews
  • 4 Stars
    6 Reviews
  • 3 Stars
    3 Reviews
  • 2 Stars
    5 Reviews
  • 1 Star
    1 Review
79% of reviewers would recommend this product to a friend
42 Reviews
Reviewed by Jennifer T.
Verified Buyer
Review posted
I recommend this product
Rated 4 out of 5

Pros and Cons

Really like the cut and the color, but it's not lined, which can be a bit problematic at times. I don't have another one piece like this, so happy to add it to my rotation.

Loading...
Was this helpful?
Reviewed by L C.
Verified Buyer
Review posted
Rated 3 out of 5

Beautiful but not for me

I loved the color and material, but it was too short for my torso.

Loading...
Was this helpful?
Reviewed by Anna M.
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5

Amazing swimsuit

Love this one! supportive, slimming and looks stylish. I’m 5’6” and got size M (tried small, it fits, but a little too open)

Loading...
Was this helpful?
Detail view of Swim Straight One-Piece in Black for sizer