DURABLE PUNCHING BAG: Strong PVC exterior resists wear and tear from daily use. SUPERIOR STRIKE DEADENING: Sand & recycled cloth interior provides superior shock absorption. STABLE HEAVY BAG: Includes bottom tie-down strap for stability during use VERSATILE HANGING BAG SETUP: Safely mount your bag on a bag stand or the ceiling BUILT TO LAST: Double-reinforced D-ring and nylon strap system delivers increased longevity