When you need an undershirt that really works, you want one made UA strong. The Original series uses Under Armour's unrivaled HeatGear® technology to wick the sweat away from your body. Then it dries quickly so you stay cool and comfortable all day. Add to that smooth, Flatlock Seams and Anti-Odor technology. What you’ve got is more than an undershirt. You’ve got Under Armour®.