Cushion Cover only Roho HP Heavy Duty 18 x 18 Orthopedic Care 8 x 1 solid rubber lactose free 8 x 1 solid rubber front casters 30 x 60 x 12 * Combination * The board rocks to stimulate the balance control feature of the inner ear * Covered with a non slip surface * The manufacturer ships this item by truck Protects ROHO cushions from rough wear and tear fluids and the degenerating effects of poor quality ozone * Helps protect the cushion from rugged use and every day wear and tear * Protects against incontinence with its fluid resistant material and durable construction * Although this new cover is ruggedly designed it still allows for the benefit of the therapeutic skin protection of the ROHO cushion * Allows for easy access to ROHO cushion valves and the ISOFLO Memory Control© on SELECT Series cushions with a double pull zipper *