This empty sandbag is made of good quality canvas cloth material is wear-resistant and durable for years of use, with a PU patch on the middle which is sleek enough to protect your hand from abrasion. It was equipped with a zipper seal, convenient and safe. The metal chain is sturdy and heavy-duty, you can hang it wall or another tough item. The stitching of this sandbag is solid and delicate, you don't need to worry it would split or tear. Metal buckles can firmly connect the sandbag and metal chain. The sandbag is empty, you can put things like rag, sawdust, sand, and beans in it. After padding, the sandbag can absorb shock to decrease the impact and protect your bones. The sandbag is perfect for developing hand and foot technique and building a nice body. You will not regret purchasing it.