Roho Replacement Wheelchair Cushion Covers are available to fit all Roho Cushions and are available in a standard Universal type or a Heavy Duty more durable type. Custom sizes are available. Please indicate custom size in inches or in cell size (ie. 10 cells x 10 cells) in the customer comments section as you place the order. The Universal cushion cover has a two-way stretch polyester top with Velcro straps on the bottom to attach to a wheelchair. It is a durable material yet is soft to the touch with a non-skid base material. Heavy Duty covers are available to fit most standard size Dry Flotation seat cushions and the AirLITE cushion. The Heavy Duty cushion cover is made to protect your cushion from rough wear and tear and incontinence with its durable construction. The cover has a polyurethane coating, which can trap heat and puts users at risk of skin breakdown at greater risk. Please note that the Heavy Duty cushion cover does not have an opening for the valve. Cushion needs to be deflated in order to put the cover on. Once the new cover is on the cushion, you can re-inflate the cushion. We recommend placing the zippered side of the cushion by the valve, allowing you to re-inflate the cushion to your comfort level.