The lightweight and smooth HeatGear fabric is comfortable to wear all day long. Mesh panels in the armpits provide strategic ventilation. 30+ UPF will protect the skin from the dangerous rays of the sun. 4-Way Stretch Manufacturing allows for greater mobility and maintains shape. Signature Moisture Transport System for optimal sweat wicking away from the body. Armour on the back of the neck, Under Armour logo on the chest. Material: Polyester / Elastane.