CENTURY Bobby Bully is the best sparring partner you can buy for a young martial artist! Great partner for sparring techniques or target training. This child sized body opponent bag is made of high strength plastisol and the inner cavity is filled with foam. Two height adjustments, from 4 foot 2 inches to 4 foot 7 inches. Base fills with sand or water and is rounded for easy roll location. Weighs approximately 170 lbs. when filled.