The TYR Women's Supersonic Diamondfit Swimsuit is constructed with TYR's most durable textile - Durafast Elite - this performance swimsuit utilizes high denier poly fiber and innovative circular knitconstruction to combine the strength and colorfastness of polyester with the comfort of spandex. Featuring a medium neckline, sleek/flexible straps, keyhole back and moderate cut leg, the Diamondfit swimsuits are the perfect performance suits for athletes who want reliable coverage that won't weighthem down. Due to their chlorine proof and colorfast nature, Durafast Elite swimsuits are able to sustain 300+ hours of use, while maintaining a comfortable hold on your body. All TYR Durafast Elite suits provide built-in UPF 50+ sun protection, as well as an antimicrobial lining for long lasting freshness.