Under Armour Women's Armour Mid Sports Bra 90% Polyester/10% Elastane Best for A to C cups UA Compression sports bras deliver strategic support, tailored for medium-impact activities like cycling, weight training & boxing Super-smooth, double-layer Classic pullover style with racer back design for enhanced range of motion Super-soft jacquard elastic band delivers a custom, stay-put fit HeatGear fabric delivers superior next-to-skin feel