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 Anti-odour technology prevents the growth of odour-causing microbes Ergonomic flatlock seams deliver a comfortable, chafe-free fit High-rise UA No-Slip Waistband for optimal coverage & support that stays put with every move you make Side drop-in pocket HeatGear Armour is Under Armour's original performance baselayer — the one you put on first and take off last. So they made it extra comfortable by wicking sweat and stretching so you can move no matter what. The ultra-tight, chafe-free fit stays put thanks to the cleverly designed waistband, and a side drop-in pocket means you'll never have to workout without your tunes.