Under Armour "Originators of Performance" Theme in Large and X-Large: - Body - 71% Nylon; 29% Elastane - Insert - 76% Nylon; 24% Elastane - Pocket Bag - 100% Polyester - Iso-Chill fabric helps disperse body heat. - Material wicks sweat & dries really fast. - Anti-odor technology prevents the growth of odor-causing microbes. - Internal bonded media pocket with waterproof backing for device protection even during your toughest workouts. - Performance waistband with graphic detailing.