Under Armour Men's Thermal 2.0 Long Sleeve Crew Shirt Ultra-soft waffle fabric traps heat without adding excessive weight, so you stay light and mobile. 4-way stretch fabrication allows greater mobility and maintains shape. Signature Moisture Transport System wicks sweat away from the body. Anti-odor technology prevents the growth of odor causing microbes . Ribbed cuffs and collar. Ergonomically shaped hem. 6.0 oz. Polyester/Elastane.