Combines the world renowned features of the Nevatear bags with a reinforced, high density LDPE base that provides maximum flexibility with outstanding durability and resilience. High density plastic base is easily filled with water or sand for stability Power transfer ring minimizes impact and reduces base movement when training High grade, shock absorbing foam with Nevatear outer layer for lasting durability Weighs 250 lb. when filled and is adjustable from 52' to 65'