Japanese style memory foam cushion, ergonomic design Round design, even support, fit the buttocks Slow rebound memory foam inner core zipper, beautiful and generous, the jacket is removable and washable size: 40 x 4cm color: gray Material: cotton + cloth Package Contents: 1 * cushion Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.