Under Armour Heatgear Flyweight Long Sleeve T-Shirt - Men'sThe long-sleeve Under Armour HeatGear® Flyweight Running T-Shirt was made with ultra-light, smooth fabric for extreme comfort and quick-dry performance. Mesh side and underarm panels provide perfect ventilation. Anti-odor technology prevents the growth of odor causing bacteria and the 50+ UPF protects the skin from damaging sun rays. This shirt features reflective graphics and logos for safety in low light. HeatGear® technology was designed for 75 to 100 degree weather. 100% polyester. Imported.