Join Our Rewards Program
Earn rewards and exclusive member-only benefits for free.
Classic One Piece Swimsuit
Classic One Piece Swimsuit
$110.00
USD
Full coverage
Sporty scoop neckline
Premium UPF 50+ fabric
Machine washable
Size and Fit Guide
How to Measure
In order to select the correct sizing, we recommend you take the following measurements using a soft tape measure. If necessary, ask someone else to help.
Waist
Measure around the narrowest part of your torso, usually just above your belly button. Keep the tape snug and level, but not tight. The number where it meets is your waist measurement.
Hip
Stand with your feet together and measure around the fullest part of your hips and buttocks. Keep the tape level and snug, but not tight. The number where it meets is your hip measurement.
Rewards Members Earn
110 Points
You May Also Like
Product Description
Swim in Style
A fit we've spent years perfecting.
Sun-Smart Protection
UPF 50+ fabric protects your skin while you soak up the sun.
Feels Made For You
Thicker, adjustable straps make it adaptable for different torso lengths. It features a shelf bra with removable cups and full bum coverage.
Zoom
How to Choose?
Essential
- • Days you don’t need leak protection. Everyday freshness and moisture wicking.
-
0 tsp
Heavy
- • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
-
about 8-14 tsp
-
about 1.5-3 regular pads
-
about 4-7 super tampons
-
about 1.5-3 menstrual cups
Light
- • Daily freshness. For sweat, discharge, period spotting, or backup protection.
-
about 1-3 tsp
-
about 1-3 pantyliners
-
about 1-3 regular tampons
-
about 0.5 menstrual cups
Moderate
- • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
-
about 4-8 tsp
-
about 1-1.5 regular pads
-
about 2-4 super tampons
-
about 0.5-3 menstrual cups
Ultra
- • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
-
about 15-20 tsp
-
about 1.5-2.5 super pads
-
about 7-11 super tampons
-
about 2-3 menstrual cups
Find Your One-Piece
The Classic
An elevated scoop-neck with timeless appeal and a built-in shelf bra - your new go-to.
The Deep V
A striking silhouette with an elongating neckline and removable cups.
The Ruched
A versatile one piece with flattering ruching and convertible styling.
The High Neck
A fashion-forward silhouette with more coverage in front, and sexy open-back detail.
Leakproof swim works in layers
The 3-layer liner absorbs and locks in leaks, whether you're in or out of the water. When washed with detergent, blood releases through the top layer for a fresh, clean suit.
Top Layer
Middle Layer
Bottom Layer
Our Best-Selling Swim
Shop All
New
Sculpt Swim Shortie One Piece
$140.00
USD
Color: Black
Sculpt Square Neck Bikini Top
$58.00
USD
Color: White
+4
Sculpt Classic One Piece Swimsuit
$120.00
USD
Color: Jasmine Dusk Limited Edition
+1
Leakproof Sculpt Deep V Swim Dress
$150.00
USD
Color: Deep Orchid Limited Edition
Leakproof Sculpt Deep V One Piece Swimsuit
$130.00
USD
Color: Jasmine Dusk Limited Edition
Sculpt High Rise Bikini Swim Bottom
$48.00
USD
Color: Espresso Limited Edition
+5
Limited-Edition Sculpt Triangle Bikini Top
$58.00
USD
Color: Cypress Limited Edition
Limited-Edition Sculpt String Bikini Bottom
$52.00
USD
Color: Cypress Limited Edition
Recently Viewed
Total 5 star reviews: 124 Total 4 star reviews: 20 Total 3 star reviews: 12 Total 2 star reviews: 4 Total 1 star reviews: 8
What our customers are saying
Generated by AI from 100 most recent customer reviews
Last updated 2 months ago
Customers say this one-piece swimsuit fits well and provides excellent support, particularly for larger busts. They appreciate the soft, thick material that feels comfortable and offers a flattering shape. Many mention the built-in cups provide good support and the adjustable straps accommodate different torso lengths. Users frequently praise the suit's comfort for swimming, aquafit classes, and beach activities. Common feedback includes appreciation for the variety of colors available and the suit's durability. Some note concerns about the bottom coverage being less than expected, with occasional riding up or fit issues in the hip area. A few mention the material can show outlines when wet or create bunching in certain areas.
88%would recommend these products
Search
Keywords
Rating
Height
Current Band Size
Current Cup Size
Usual Pant Size
168 reviews
- Rated 2 out of 5 stars14 hours agoGreat but strap broke immediately
I love this swimsuit - it holds up my larger (post breast feeding chest very well 34DD). It also holds me in well (post 2 csections). I am typically a size 10 and a m+ fits me perfectly. I love it BUT the plastic/acetate strap broke after 3 wears. I’ve done a minor fix, but now the straps are uneven (5 chains on the left and 4 on the right). Proceed with caution!
GGraceVerified BuyerReviewingLimited-Edition Sculpt Classic One Piece Swimsuit - Rated 1 out of 5 stars4 days agoDoesn’t fit well
Fits at the top but too loose at the bottom and doesn’t cover the bottom enough. I am constantly pulling it over my bottom. Unfortunately I wore it in a hot tub so I can’t return.
MRMaureen R.Verified BuyerReviewingSculpt Classic One Piece Swimsuit - Rated 1 out of 5 stars4 days agoCamel Toe
Unfortunately it’s giving camel toe. Otherwise it’s nice but I don’t want to flaunt camel toe
EMEmily M.Verified BuyerReviewingSculpt Classic One Piece Swimsuit - Long Torso - Rated 5 out of 5 stars4 days agoNew everyday suit
This is beautiful well constructed staple in my bathing suit lineup. Classic lines, Great fit, good coverage
GNGillian N.Verified BuyerReviewingClassic One Piece Swimsuit - Rated 5 out of 5 stars5 days agoGreat fit and lovely pattern.
Bathing suit fits well. It feels snug but not too tight. The ajustable straps are great!
MMMacha M.Verified BuyerReviewingSculpt Classic One Piece Swimsuit - Rated 5 out of 5 stars1 week agoSculpt Swimsuit very comfortable
I don’t have a long torso, buy I shortened the straps. It is very comfortable and the patterns flatter the body. I would definitely recommend buying one.
JGJanice G.Verified BuyerReviewingSculpt Classic One Piece Swimsuit - Rated 5 out of 5 stars1 week agoI need this in more colours!
This is my new favourite swimsuit. Finding suits that fit for a long torso has hard and ordering online is always a gamble. I was thrilled that this suit fit me perfectly. Snug in the best way and lifted my bus. I would love if knix would offer it in other colours!
CBChristina B.Verified BuyerReviewingSculpt Classic One Piece Swimsuit - Long Torso - Rated 3 out of 5 stars1 week agoShelf Bra Isn’t Supportive
As I’ve been figuring out what support I need for my changing body (currently postpartum and breastfeeding with my second), I was very hopeful for this suit especially since it has the bigger cup option and a shelf bra. The issue is that the band on the shelf bra is attached to the main suit and isn’t very snug. It holds my breasts in the cups when I first put it on but they eventually slip below the band. The bum coverage was a little less than I expected but still reasonable. The fit and feel of the fabric is very good otherwise!
ESEmily S.Verified BuyerReviewingSculpt Classic One Piece Swimsuit - Rated 5 out of 5 stars3 weeks agoPerfect fit!
Classy and comfortable! I got several compliments when I wore it last weekend!
KKnix3 weeks agoHey Angela!
This is amazing! We're so thrilled you're loving the fit and feel of your Limited-Edition Sculpt Classic One Piece. Nothing beats compliments while wearing Knix!
Team Knix
AFAngela F.Verified BuyerReviewingLimited-Edition Sculpt Classic One Piece Swimsuit - Rated 5 out of 5 stars3 weeks agoGreat suit
Great support and quality material! Like it so much I bought another.
KKnix3 weeks agoHey Katie!
This is amazing! We're so thrilled you're loving the support and quality of our Sculpt Classic One Piece. Nothing beats a customer loving it so much they buy another!
Team Knix
KMKatie M.Verified BuyerReviewingSculpt Classic One Piece Swimsuit - Rated 5 out of 5 stars3 weeks agoGreat fit and love the detail.
Accurate description, love the color, and received many compliments.
KKnix3 weeks agoHey Gretchen!
Thanks so much for the amazing review! We're thrilled you love the fit, color, and details. Getting compliments in your Knix is the best feeling!
Team Knix
GDGretchen D.Verified BuyerReviewingLimited-Edition Sculpt Classic One Piece Swimsuit - Rated 5 out of 5 stars3 weeks agoPrinted sculpture classic one piece e swimsuit
My favourite bathing suit ever!!
KKnix3 weeks agoHey Linda!
This makes us so happy! We're thrilled to hear the Sculpt Classic One Piece is your favourite bathing suit ever!
Team Knix
LPLinda P.Verified BuyerReviewingSculpt Classic One Piece Swimsuit
