The RUNNERUPENTERPRISES PANTHER SERIES Special Heavy Bag is a versatile training tool suitable for boxers and martial arts fighters. It can be used for punching and striking while hanging vertically and for ground strikes and movement techniques when taken to the floor. The bag is made of heavy-duty, easy-to-clean P/U material with double-reinforced seams, designed to withstand the punishment of MMA and ground and pound techniques. When hung vertically, the removable 4.2-inch wide wrap-around strap at the top of the bag has a heavy-duty Velcro backing and sewn-in hanging D-rings for easy weight support. The ergonomic shape and weight of the bag when hung vertically allows for a full range of punches, jabs, right and left-hand hooks, and uppercuts.