The Under Armour First Or Last T-Shirt is made with an ultra-soft, lightweight fabric that provides extreme comfort and performance. Signature Moisture Transport System wicks sweat away to keeo you cooler and drier. Anti-odor technology prevents the growth of odor causing microbes, keeping your gear fresher, longer. Smooth flatlock seams allow a full range of motion without chafing. HeatGear® works best in weather between 75 and 100 degrees. 60% cotton/40% polyester. Imported.