MAXIMUM RELIEF AND COMFORT: Ultra premium memory foam layered with soothing gel technology provides ultimate support and comfort. New larger design with more gel coverage than other gel cushions. Designed to relieve pain and tension from the lower back, coccyx (tailbone), hip, spine, and sciatic areas. DURABLE: 100% Premium therapeutic grade memory foam combined with gel. Will not flatten out with prolonged use. Non-slip bottom ensures the cushion stays in place and will not shift or slide on any surface. ERGONOMIC: Promotes good posture, spine alignment, and healthy weight distribution for hours of comfortable sitting.