HG Armour Biker ShortHeatGear is our original performance baselayerthe 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. Super light HeatGear fabric delivers superior coverage without weighing you down Material wicks sweat & dries really fast 4 way stretch material moves better in every direction Ergonomic flatlock seams deliver a comfortable, chafe free fit High rise encased elastic