Under Armour Boys' UA Combine Bolt Shortsleeve T-Shirt Lightweight fabric perfect for a baselayer to keep athletes cool and dry for peak performance Signature Moisture Transport System wicks away sweat to keep you cooler, drier, and more comfortable Blown-out mesh back delivers for even greater ventilation and helps shed excess water weight Anti-odor technology prevents the growth of odor-causing microbes to keep your gear fresher, longer Smooth flatlock seams offer chafe-free comfort