Columbia Women's Seamless Spacedye Racerback Sports Bra 57% Polyester, 37% Nylon, 6% Spandex Imported Machine Wash Medium support for and hiking, biking and wear all day sports bra Seamless, feminine v-neckline for easy on and off over the head Racer back design for range of motion and knit in texture for breathability Omni-wick advanced evaporation pulls moisture away from the body and enables perspiration to evaporate quickly, keeping you dry and comfortable Removable cups for enhanced shape and coverage