This Convoluted Egg Crate Foam Chair Cushion has a unique, convoluted surface that helps with weight distribution and air circulation, providing comfort and support for long periods of time. Made of medical-grade foam, it is specially designed to prevent and treat decubitus ulcers, helping to reduce pressure on the tailbone and back. An excellent aid after surgery or injury, this cushion also makes a valuable gift for your loved ones or patients. Available in blue.