Even though our bodies are designed to sit…complete with strategically placed padding, it simply is not enough. Good thing we have a large selection of seat and back cushions for just about every sitting situation from the car to wheelchair, and desk to park bench. U-shaped cutout reduces spinal and tailbone pressure. Provides incredible comfort and relief to your coccyx. Wedge angle encourages pelvic tilt to reduce pressure on lumbar discs and promotes a better posture. Perfect for home, office or travel. Includes convenient carry strap for easy transport. Improved cover is made of breathable, more durable fabric and is removable and washable. Weight capacity: 250 pounds; Dimensions: Low - 16.5"W x 16.5"D x 1.25"H/High - 16.5"W x 16.5"D x 4"H