Under Armour Women's HeatGear Armour 80% Polyester/ 20% Elastane Imported Compression: Ultra-tight, second skin fit Ultra-tight, second-skin Compression fit that locks you in & makes you feel like you can do anything Super-light HeatGear fabric updated to deliver superior coverage & support Signature Moisture Transport System wicks sweat to keep you dry & light Lightweight, 4-way stretch construction improves mobility & maintains shape