SPEEDO Flash Forward Y-Back Adult New Y-Back with a bold new look! Open back featuring thin strap silhouette for comfort and mobility with splicing that has a new sporty look. Designed with Xtra Life Lycrau00ae Fiber for a long-lasting fit. Swimsuits have to contend with some pretty harsh stuff; chlorine, perspiration, greasy oils found in sunblock, and stretching from constant use.