This product will be on sale until December 31st. Thank you for your understanding. ================================= This is a cushion for wheelchairs that excels in preventing bedsores. It also features urethane foam that combines comfort and durability, designed to fit the pelvis and femur. - Three-dimensional molding fits the buttocks and helps stabilize posture. - Features an easy-to-clean Dartex processed cover. The size is 38cm x 38cm, the thickness is 5~7.5cm, and the weight is 800g. As this is an expensive product, I believe it is a very good value. Thank you for your consideration.