|Columbia Seamless Racerback Omni-Wick Sports Bra (RH1C021). Amp up your spin class wardrobe in this basic seamless sports bra with moisture-wicking properties. Made of nylon and spandex. Stretchy, seamless, wireless cup is lined, with pockets for removable padding, included. Tall center front features compression to keep breasts from bouncing while you're moving. Wide elastic underband with logo at left side. Omni-Wick Advanced Evaporation fabric technology wicks away moisture keeping you cool and dry. Seamless sides and back have covered elastic at edges for a great fit. Non-adjustable, covered elastic straps are wide and help prevent bouncing. Racerback. Pull-over styling. Tagless. Perfect for medium impact activities like gym class or hiking.