The Sleep Yoga Go Seat Cushion features an ergonomic design with a contoured surface providing optimal support for buttocks, hips, and thighs. Putting less strain on the lower back spine and pelvis to help prevent discomfort and problems in the future. 10% larger than other seat cushions on the market! Full seat coverage for office chair, car seat, truck, plane, computer desk, stadium seats, bench & wheelchair. Easy and lightweight to take on the Go! The perfect balance of firmness and softness, providing most comfortable support, ideal for people who suffer from the discomfort associated with sciatica, herniated discs, tailbone injuries, pregnancy back pain, hip pain, hemorrhoids, and other spinal issues. -Full seat coverage for office chair, car seat, truck, plane, computer desk, stadium seats, bench & wheelchair. -Ergonomic design with a contoured surface providing optimal support for buttocks, hips, and thighs. -Easy and lightweight to take on the Go! -Oversized design. -Fabric: 100% Polyester. -Fill: 100% Polyurethane foam. 17 in x 16.5 in x 4.5 in Imported Material & Care Polyester Machine washable