Our ultra-comfortable grey FORTEM ORTHOPEDIC MEMORY FOAM SEAT CUSHION is ergonomically contoured to distribute body weight evenly. It also offers supportive padding that gently conforms to the contours of your body, working as a perfect aid to keep your coccyx, spine, and hips buoyant and relaxed. The durable LUMBAR SUPPORT CUSHION works to support your back for maximum comfort during long periods of sitting. These two products work in harmony to alleviate sore, swollen muscles and joints, and to prevent back pain, while at the same time giving you the feeling that you're sitting in the most comfortable, luxurious seat you have ever encountered! Seat Cushion Dimensions: 18x14x3 inches Lumbar Dimensions: 15x12x4 inches