HeatGear Armour is the original performance baselayer, the layer you put on first and take off last. It's tight to wick away sweat and quick-drying to keep you cool. No athlete can go without it. Features super-light HeatGear fabric that delivers superior coverage without weighing you down. Four-way stretch construction moves better in every direction, ergonomic flatlock seams deliver a comfortable, chafe-free fit and updated, branded elastic waistband has a super-soft brushed interior just right on your hips. 86% Polyester, 14% Elastane.