Stay cool and dry while you workout in the Under Armour Men's HeatGear Armour Mock Sleeveless Top. This top is made from 84% polyester and 16% elastane HeatGear® fabric for lightweight coverage. The anti-odor technology prevents the growth of odor-causing microbes for all-day freshness, while the mesh underarm and back panels allow for strategic ventilation. Features and Benefits Made from 84% polyester and 16% elastane HeatGear® fabric for lightweight coverage Material wicks sweat and dries fast so you stay dry Anti-odor technology prevents the growth of odor-causing microbes for all-day freshness Sleeveless Mock neck Compression fit Mesh underarm and back panels allow for strategic ventilation Ergonomic design keeps seams off high abrasion areas for added comfort Write-in locker tag on back of neck for your initials or number Machine wash cold with like colors, use only nonchlorine bleach when needed; tumble dry low, do not iron, do not use softeners, do not dry clean