HeatGear® is our original performance baselayer—the one you put on first and take off last. So we made it extra comfortable by wicking sweat and stretching so you can move no matter what. HeatGear fabric is ultra-soft & smooth for extreme comfort with very little weight. 4-way stretch construction moves better in every direction. Material wicks sweat & dries really fast. 90% Polyester/10% Elastane. Fitted: Streamlined fit that's not too tight or too loose. Style #: 1368511