Product DNA What's It Do? HeatGear® Armour is our 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. The Fundamentals Compression: Ultra-tight, second skin fit Super-light HeatGear® fabric delivers superior coverage without weighing you down Material wicks sweat & dries really fast 4-way stretch construction moves better in every direction Ergonomic flatlock seams deliver a comfortable, chafe-free fit Wide, flat waistband that sits just right on your hips Inside leg: 61 cm 87% Polyester/13% Elastane