Now you can train Iron Palm and Iron Body! Designed by China’s leading Iron Palm and Iron Body expert, Grandmaster Alex Tao, these heavy double-stitched bags are filled with mung beans that provide good resistance for strikes and are known for their skin conditioning properties. The large bag is for strikes. The two small bags slapped to against your body and limbs for conditioning. Contains 1 large (8 x 12 inch) bag and 2 small (4 x 6 inch) bags.