This is a used item, but it's in good condition with no sagging and is comfortable to sit on. There are no noticeable stains. I have written my name on the back, so I will erase it with a marker before sending it. Please understand. This is a bed sore prevention cushion, with buoyancy as its key feature. The Pitacushion 55 is a two-layer type (55mm high) that combines a three-dimensional lattice-shaped gel cushion and urethane. The gel cushion disperses body pressure and reduces the pressure on the buttocks. Also, based on ergonomic theory, the seating surface is molded to the shape of the buttocks. It fits snugly so that the buttocks are completely seated, minimizing lateral and forward slippage. Because it is a two-layer type with urethane, it provides a comfortable sitting experience even on hard-seated chairs such as benches. * In winter, when you are concerned about the coolness of the gel, please use it with the urethane side up. Size: Length 40cm x Width 40cm x Height 5.5cm ● Weight: 1.25kg ● Side fabric: Polyester knit (100% polyester) ● Material: Highly breathable gel (thermoplastic resin), urethane foam ● Washing: Hand wash, do not tumble dry OTAIS-00857-000006 ● Manufacturer: Fundina Retail price: 10,690 yen.