&Medical KURA SEAT Seat Cushion Posture Correction Back Pain Chair Cushion Pelvic Support Posture Support Compact &MEDICAL Kura Seat (Ash Gray) I bought this thinking it would be good for my back pain, but it didn't suit me, so I'm selling it. There is no box, but it's an item I used for about 3 days. Please check the photos before purchasing. ~Excerpt from the web~ [Posture Support Seat Inspired by a Saddle] Jockeys maintain a beautiful posture with a straight back and a stable upper body even on a horse that is constantly swaying and unstable. The secret was in the horse's "saddle." The saddle has a recessed center and supports the buttocks from the front and back to prevent them from slipping. KURASEAT was developed with a hint from the shape of this saddle. The smooth curved seat that matches the roundness of the buttocks makes it less tiring to sit for long periods of time and supports a comfortable sitting experience. If you usually use a seat cushion and are concerned about your posture or back pain, please use it instead of a seat cushion.