Thank you for viewing. This is a wheelchair cushion, the Terraflare. I used it for about six months. No air leaks. I will include a brand new air pump and instruction manual (a few pages in Japanese) and a care kit for when a hole is made in the air portion. It's a cushion that combines a Roho cushion and a memory foam cushion. Size: Width: 38 cm Depth: 45.5 cm The "Terraflare" achieves both of the two conflicting elements required of a cushion - stability and pressure relief - with its unique design and materials. Product Features ・Pressure relief effect by air cells ・Relieves skin damage to the buttocks ・Excellent stability Recommended for: ・Those at high risk of pressure sores ・Those who prioritize stability ・Those who have given up on air cell cushions Please understand that this is not new and unused before purchasing. I may change the shipping method from Rakuraku Mercari Bin to Yuuyu Mercari Bin.