Under Armour Boys' Storm ColdGear Infrared Werewolf Jacket 100% Polyester Lightweight woven fabric delivers superior comfort & durability 10K/10K rating Fully taped seams & 100% waterproof, breathable ArmourStorm construction keeps you dry inside & out Signature Moisture Transport System wicks sweat to keep you dry & light Stretch waistband with internal drawcord for a secure fit