Under Armour MK1 1/4 Zip-BLU T-shirt. The super-light HeatGear fabric gives you comfort throughout the day.4-Way Stretch production allows for greater mobility in any direction.Anti-Odor technology prevents the formation of microbes that cause an unpleasant odor.The material is a great sweat wicker and it dies very quickly.Mesh panels in the armpits and back for strategic ventilation.Under Armour logo on left shoulder and neck.Material: Polyester / Elastan.