|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.