Round void area suspends effected area from painful pressure. For relief of discomfort associated with tailbone, Coccyx, post childbirth and lower back pain. Round Donut Cushion is thick fluffy for the experience of high softness comfort seating. Round shape suited for a variety of sized wheelchairs as well as other types of seating. Specifications Diameter: 44cm Height: 11cm Cushion Inners: Soft silicone fibre Cushion cover: Soft Faux Fur