Designed to keep you dry while exercising, the Siren Splash II Tank features Omni-Wick moisture management technology, which wicks sweat away from the body for quick, advanced evaporation. UPF 50 Omni-Shade sun protection technology blocks harmful UV rays. 92% polyester, 8% Lycra elastane Fab knit jersey is a 4-way comfort stretch fabric. Internal bra. Imported.