TYR's DURAFAST Elite Solid Ring Back Work out Bikini - WOB - BRNN7A The BRNN7A Ringback steps beyond the bounds of monotonous workout suits. One Made from 100% Durafast technology, Ringback fits to perfection. And with sleek straps and draw cord bottoms, it feels even better. The Durafsat Stretch Work Out Bikini Swimsuit utilizes a thin strap, ringback design, for minimal strap constriction and maximized support. Engineered for training and fitness routines, this women's swimsuit lasts 20 times longer than traditional swimwear and is 100% chlorine proof for 72 hours of exposure. Showcasing TYR Durafast Stretch construction, the BRNN7 provides 100% colorfastness and maximum sun resistance, for performance in and out of the water. Designed to maintain a comfortable hold on your body, Durafast Stretch offers the same technical benefits of Durafast Polyester, in addition to control and memory like you've never experienced before in a swimsuit.