Donut-shaped posture correction cushion made of soft fabric. Bisei Cushion, Beautiful Butt Cushion, Soft to the touch, Uses low-resilience urethane, for lower back pain relief (Pink) I used to use this, but I'm selling it because I don't use it anymore. Features: Comfortably wraps the pelvis 360°. Uses: Supports the lower back with a three-dimensional backrest. Material: (Body fabric) Polyester, (Cushioning material) Urethane foam Dimensions (mm): 400 x 400 x 140 Weight (g): 631 - Color: Pink Thank you for viewing.