Comfy and Support: Our 2"" D-shaped seat cushion, made with polyurethane high-resilience foam, protects your tailbone, relieves pressure, and relaxes muscles. Durable and Comfortable: Made of polyester, the cushion cover has reinforced edges for lasting durability and a wrapped zipper. Soft and breathable, it keeps your cushion comfortable. Steady Comfort: The cushion stays in place with a non-slip base and optional ties, so you can sit without slipping. Hassle-free Care: The removable zippered cover makes cleaning easy-machine wash cold, tumble dry low. Do not wash the foam insert. Fits Chairs: This cushion provides soft, supportive comfort for dining, kitchen, folding, or rocking chairs. Measure your seat before ordering.