Plemo Memory Foam Seat Cushion, Lumbar Coccyx Support & Portable, Help with Sciatica Relief Extra comfort polyurethane seat cushion capable of dispersing spinal pressure evenly to relieve muscle fatigue, ease discomfort and reduce pressure on the coccyx, lower back and hips The high density memory foam retains its shape and provides optimal support for your back and spine while preventing slipped discs when sitting on stools, in cars, airplanes, buses or wheelchairs for prolonged periods of time Molded foam conforms to the curves of your hips and legs; promoting a correct and healthy sitting posture while providing unparalleled comfort Mesh cover and specially engineered design with an empty space in the middle of the pad for continuous air flow, avoiding discomfort around sensitive areas Easy to clean with a zippered, machine-washable mesh cover and anti skid materials on the underside of the cushion to prevent slipping and sliding