Most Comfortable Gel Memory Foam Cushion On The Market - ComfiLife's all-in-one features are unrivaled: Non-slip rubber bottom, built-in handle for easy transport and machine-washable zippered velour cover for easy cleaning. The ComfiLife Coccyx Cushion is the best gel memory foam seat cushion on the market made of premium quality durable memory foam with cool off gel layer on top for superior comfort.