Car Seat Lumbar Support Back Cushion Air Pump Type You can attach a lumbar support (back cushion) to your car seat. It can also be attached to gaming chairs, office chairs, and living room chairs with the belt straps. The air gradually leaks out, so if the support weakens, you can easily inflate it with the air pump. You can also easily deflate it with the pump, allowing for fine adjustments. Thank you for viewing.