Filling this 21 in bag with water gives it a body-like feel that dry filler cannot match: the mass moves on impact and pushes back along the line of the punch rather than swinging as a rigid block. Black PVC forms the outer shell, thick enough to take repeated strikes and elastic enough to snap back between combinations. The water fill keeps noise down, so training early or late is realistic at home. The bag hangs 28 in tall from an adjustable metal chain that sets the striking height, and a 39 in hose handles filling and emptying. Empty weight is 15.5 lbs, so it can be drained and stored in a cupboard when floor space is needed at home.