Project Rock training gear was built to help you find boundaries, then push right through them. Everything in this collection was personally approved by Dwayne Johnson, the hardest worker in the room. ANY room. Ultra-soft cotton-blend fleece with brushed inside for extra warmth. Ribbed collar, cuffs & bottom hem. Main body fabric engineered to reduce fiber shedding leveraging Under Armour's Fiber Shed Test Method. Loose: Fuller cut for complete comfort. 56% Cotton/44% Polyester