Features:
Strong material with PU on the outside, very powerful to punch and train your hands or feet.
The chain with hook is rotary, it can prevent them mixing together.
Smooth inside, it can be filled easily and quickly, like rag, saw dust, sand, etc. But it can not be all sand.
Suitable for punching kicking and other practicing.

Specifications:
Material: PU & Oxford Cloth
Color: Camouflage 
Max Loading: 25kg
Size: 55cm / 65cm / 75cm(optional)
Dimension: 55 * 25cm / 21.65 * 9.84in, 65 * 28cm / 25.59 * 11.02in, 75 * 28cm / 29.53 * 11.02in
Package Size: 71 * 41 * 3cm / 27.95 * 16.14 * 1.18in
Total Weight: 956g / 2.11lb

Package List:
1 * Empty Boxing Bag
1 * Chain