HeatGear(R) is Under Armour's original performance baselayer-the one you put on first and take off last. They made it extra comfortable by wicking sweat and stretching so you can move no matter what. Fit & Design: HeatGear(R) fabric is super-light, breathable & dries fast 4-way stretch material moves better in every direction Updated gusset shape & ergonomic flatlock seams deliver a comfortable, chafe-free fit Exposed elastic waistband with wordmark detail Odor control technology minimizes odor Inseam: 5"