Kensington Premium Cool-Gel Seat Cushion - 14" x 18" - Gel Filling - Fabric Cover - Foam - Comfortable, Durable, Anti-slip,from $71.19 up to $82.93 Compare prices2→Zero tailbone pressure minimizes contact between tailbone and seat cushion Honeycomb memory foam provides durable structural support Cooling fabric with cool-gel core keeps you comfortable when seat more→ed Ergonomic design alleviates discomfort due to prolonged sitting Anti-slip backing prevents sliding to prevent frequent adjustments