Keeps Pelvic Support Cushion Pelvic support cushion that is comfortable even when sitting for long periods. Black. Holds the pelvis and sacrum with a triangle support system, maintaining an ideal sitting posture. Pressure-dispersing structure, air hole processing, durable high-resilience, high-elasticity urethane. Seat cushion, chair cushion. It's clean as it has been used very little, but please check the last image for a small white linear mark. No box or instructions. Please understand that this is not new and purchase if you are okay with a used item. Thank you.