What's it do? This season, we're bringing back the very first version of HeatGear® we ever made—thicker, more compressive, and ultra-cooling—because athletes were demanding it. Product DNA - Our original, thicker HeatGear® fabric helps keeps you protected under your gear—limiting pinching, snagging & chafing - Material wicks sweat & dries really fast - 4-way stretch material moves better in every direction - Ergonomic flatlock seams deliver a comfortable, chafe-free fit - Light & tight fit with optimum muscle compression so you can sense where your body is in space - Compression: Ultra-tight, second-skin fit. - Style #: 1387697 - 83% Polyester/17% Elastane - Imported