■Firm cushioning and lots of great features! The back is a two-layer structure using two types of urethane. The hard urethane base holds your body firmly, while the crushed chip urethane on top wraps you in a fluffy embrace. Even if you sit for a long time, your back will be firmly supported and you won't feel the cold. Since it is made entirely of urethane and has no hard parts, it can be used safely even in homes with small children. Width: 25cm / Height: 31cm ■ Fastened with zipper The mat and backrest can be easily attached and detached with a zipper, making cleaning, rearranging, and storage easy.