Core Bikini Top
Built for movement, made for support.
The Core Top is our most athletic silhouette, giving you confidence, coverage, and comfort in every move. Crafted with our seamless, single-layer FlexFlo fabric, it’s breathable, fast-drying, and designed to stay put whether you’re hiking, surfing, or breaking a sweat. The Core delivers that secure, second-skin feel without sacrificing style.
Field Tip: True to size.

Underbust Measurement
Start with the underband: hold one end of the tape front and centre, directly underneath your boobs. Pull the tape around your back to meet the front.

Bust Size
Hold the end of the tape measure at the centre again but this time around the fullest part of your chest. Don’t pull too tight! Just secure enough that it doesn’t droop.

Bottoms Size Chart

Let customers speak for us
from 81 reviewsSo comfy. The shape is nice and it doesn’t dig in anywhere. I’ve already worn it for a beach day and a hike, no complaints at all.
Didn’t expect to like it this much, but the fit is spot on. Supportive without being stiff. Really impressed.
Great experience overall. Shipping was fast, the packaging was cute, and everything fit just like the site described. I’ll definitely order again.
This top fits so well. It’s soft, comfortable, and somehow stays perfectly in place without feeling tight. I’ve been wearing it nonstop.
Fits a little snug but true to size for a small, looks great!
Absolutely loved these bikinis! Perfect fit and seamless lines. Definitely recommend these
Can't wait to spend a day at the lake in these! So comfortable and cheeky!
Had an issue with sizing on a top. Return was easy though I did have to pay a restocking fee so I didn't get a full refund. They did send me a new top for free without me even asking for it, the new top and different size fit great!
The perfect fit and just the right amount of coverage. Love that they don’t dig in or move around! For someone who’s built very rectangular, I’ve never found another bikini bottom that fits this well.
Love love love my Bearass bikinis!! They fit so well and don’t move around (so no wardrobe malfunctions here)!! Definitely a must try!
SO happy to have found Bear Ass… finding comfortable bikinis that are cute is so difficult! These are hands down the softest, buttery and beautifully made pieces. I started wearing them as undergarments too!! Such an affordable price and flattering cuts. Definitely the most versatile swim suit ever!! Will be purchasing every collection >>❤️
SO happy to have found Bear Ass… finding comfortable bikinis that are cute is so difficult! These are hands down the softest, buttery and beautifully made pieces. I started wearing them as undergarments too!! Such an affordable price and flattering cuts. Definitely the most versatile swim suit ever!! Will be purchasing every collection >>❤️
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Built for Life on the Go.
Whether you're backpacking across the desert, or going surfing at your favorite beach - we've got you covered!
The worlds most comfortable bikini
Our products are built to be as comfortable as possible, without sacraficing give you the confidence to go live your best life.
Seamlessly contours to your body
Our suits are built without a single seam. This ensures the most comfortable wearing experience, and even support in the areas you need it most.
Small Batches. Big Demand.
We make every drop in limited runs. When it’s gone, it’s gone, no restocks guaranteed.
Free Returns
within 30 days of purchase
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