Perfect offense and defensewith this all in one training device. Its unique design simulates incoming punches, forcing the boxer to slip , block, or move. A recessed, nylon handle on the back end allows a coach to control its movement and get a first person view of the athletes form. Its ideal for developing timing and counter punch techniques. At 40lbs. it packs enough weight to absorb solid punching. It is made of durable synthetic leather with four hinged hanging straps made of nylon for consistent movement.