Dramatically improves seating comfort on any surface: This cushion can be used while driving, on a plane or train, in a wheelchair, in bed, at the kitchen or dining table and at your computer desk at home or in the office. EASY INFLATION FOR MAXIMUM COMFORT: The unique self-sealing system allows you to easily adjust the air level and firmness for your specific body type. Includes free, easy-to-use multi-purpose hand pump. HELPS PREVENT PRESSURE ULCERS AND BACK PAIN: Ergonomic, waffle design evenly distributes your weight to provide comfort against pressure point pain. Thoroughly comfortable and leak tested against leading seat cushions to ensure your satisfaction. The unique waffle design provides ample ventilation and the vinyl coating is easy to clean. EASY TO TAKE ANYWHERE: This lightweight design allows you to easily transport from chair to chair or quickly deflate and re-inflate on the go.