This is a bounce cushion made by a fitness club. Retail Price: 9,768 yen ◆Included: Instruction manual Exercise guide ◆Specifications: Size: Width 32 x Depth 27 x Height 22cm Weight: 2.0 kg Materials: Polyester, urethane, iron By sitting and placing your feet on it and "stepping down," you can efficiently exercise your lower body muscles all at once. It's easy on the body and comfortable, yet it can also help to slim a protruding belly. You can try it while watching TV for your health and diet. I used it a few times after purchasing it, and there are no noticeable stains or dirt on the product. Please understand that this is a used item, and thank you for your consideration.