Doctor's (R) Round Seat Cushion φ400×90mm AP-5613 1 piece

The memory foam relieves strain on the lower back, and each side of the cover has a different material for winter and summer. The hole in the center distributes your weight and stabilizes your lower back when you sit, allowing you to sit comfortably for long periods of time. Color: Blue-gray Size (mm): φ400×90 Material: Body: Low-resilience urethane foam (Protective cover: Polyester), Outer cover surface: Cotton, polyester, Outer cover back: Cotton, linen Cover washing method: Machine washable (use a laundry net) / Do not tumble dry