tail vertebra decompression memory foam mat post-surgery long-sitting office hip-shaping breathable seat cushion for class learning thickened cushion 尾椎减压记忆棉坐垫术后久坐办公室美臀透气座垫上课学习加厚坐垫

* 0 * type cushion + small waist lumbar support pillow-double yellow snow silk rice * 0 * type sheath silver gray * 0 * type sheath corn yellow * 0 * type sheath wormwood green * 0 * type hip bag gentle pink * 0 * type hip bag * 0 * type cushion + small waist lumbar support pillow-pink * 0 * type cushion + small waist lumbar support pillow-beige * 0 * type cushion + small waist lumbar support pillow-green * 0 * type cushion + small waist lumbar support pillow-double gray * 0 * type cushion + small waist lumbar support pillow-black

40*37*8 [please allow for slight measurement errors]