Ostra String bikini | Premium Streetwear by Breakin' Atoms

A deep-sea essential reimagined in rich blue. The Ostra bikini features embroidered starfish details on a classic triangle cut, with adjustable ties for a sculpted, sun-ready fit. Light, flexible, and designed to catch eyes from shoreline to after-swim.

Soft, stretchy fabric with UPF 50+ sun protection
Available in sizes up to 6XL
Removable padding in the bikini top for customizable comfort
Multiple ways to tie for adjustable fit and styling
Color design options available for swimwear lining
Free shipping included with the order of this product

Care & Construction Notes:
Due to the 2-layered construction of the Ostra bikini, a visible stitch may appear at the crotch seam—this is standard and does not affect quality or performance.
To keep your Ostra bikini looking fresh, rinse thoroughly after each use to remove salt or chlorine residue.

Size guide

Heavyweight premium cotton construction (6oz+ for tees, 12–16oz for fleece). Double-stitched seams throughout. Pre-shrunk and garment-dyed for lasting color and shape retention. Built to carry weight — yours and the world's.

Relaxed fit with a slightly dropped shoulder and roomy body. True to size — order your usual size for the intended relaxed silhouette, or size down one for a more fitted look. View our size guide for detailed measurements.

Machine wash cold, inside out. Tumble dry low or hang dry for best results. Do not bleach. Iron on low heat if needed. Garment-dyed pieces may have slight color variation — this is intentional.

Free standard shipping on U.S. orders over $150 (3–5 business days). Express shipping available at checkout. International shipping available.

Free returns within 30 days of delivery — items must be unworn with tags attached. View return policy.