Body: 53% polyester 47% PBT;Lining: 100% polyester;MEDIUM SUPPORT -Regular straps work for a wide, middle range of sizes and activity.;MINIMAL BOTTOM COVERAGE -An exposed back and minimal bottom cut for comfort, range of motion and great style.;FULLY LINED for better fit and support;FLAT SEAMS for reduced chafing;Nike HydraStrong fabric provides long-lasting durability, swim after swim;Heat transfer Swoosh