Wagan IN9112 Relax Fusion Lumbar Memory Foam and Gel Seat Cushion Memory foam combined with gel cushion instantly transforms any chair or seat into a more comfortable one Leaning against this lumbar cushion's contoured shape provides ergonomic support for your mid and lower back, while improving circulation and overall health Durable mesh cover wicks moisture and heat away from your body and breathable polyester inner liner maintains maximum cooling transfer from the gel A built-in strap allows the cushion to be secured to your chair or seat so it will stay in place as you lean against it, plus the polyester cover is easy to clean (removable and washable) Use this cushion at home, work and when you travel; perfect for office workers, bus/taxi drivers, airplane travelers, anyone in a wheelchair, and more