Under Armour Women's HeatGear Armour Sports Bra 90% Polyester/ 10% Elastane Imported Best for A to C cup sizes Built for Mid-Impact support so you can stay fit & focused Super-smooth, double-layer HeatGear fabric delivers superior next-to-skin feel & lasting comfort Classic pullover style with racer back design for enhanced range of motion & easy layering New super-soft & stretchy branded elastic band delivers a custom, comfort fit