Under Armour Lightweight Tech 1/4 Zip L/S T-Shirt - Men's Keep cool as your run heats up with the Under Armour Lightweight Tech Half-Zip T-Shirt. Best for weather between 75-100 degrees, HeatGearŪ pulls sweat from your skin so you stay cool and dry. Lightweight UA Tech fabric promises an ultra-soft, natural feel. Anti-odor technology prevents odor-causing microbes, keeping you feeling and smelling fresh. Featuring smooth flatlock seams, this running t-shirt reduces chafing. Signature Moisture Transport System. 100% polyester. Imported.