Champion Concrete Duffle The Champion Concrete duffle Bag is a uniquely designed accessory that can be transformed into both backpack and a duffle bag Features adjustable, detachable backpack straps Also has an adjustable, detachable padded shoulder strap Top panel has a 3D mesh panel so when you decide to wear it as a backpack, your back will stay dry Includes ventilated side pockets, zippered mesh side pockets and front pocket for maximum space for all your needs