CrazyDeal spontaneous unaffectedDeluxe Memory Foam Back Ache Pain Office Chair Orthopedic Seat Solution Cushion Special wedge shape with U Cutaway for your tailbone. The sit right,feel right,comfort cushion. Grade Foam for support and comfort. Seat Cushion is designed to relieve nagging backaches, numbness, and discomfort while you sit. Breathable Fabric Side - Keeps you cool and comfertable. Water/Stain Resistant Side - Just wipe clean. Material:Lint +Polyurethane Foam. Color:Black,Light Gray,Blue,Purple,Rose Red. Size:45cm x 35cm x 7cm - 17.71inch x 13.80inch x 2.76inch.