The new rave and innovation of boxing, MMA and cross training athletes. Long cylindrical shape is ideal for swings, twists, lunges, pulls, thrusts and much, much more. Constructed of heavy-duty Cordura nylon cover and seatbelt nylon double thick handles for extra-long life and extended training options. Easily fills with sand or gravel to attain the listed weight. Comes complete with nylon inside pouches that fill to desired weight for ease in filling. End cap unzips for adding or removing weight. Weighs 50 lbs. when filled. Ships unfilled.