Cushion Cover only Roho HP Heavy Duty 22 x 18 Hip Knee Post Surgical Prdct pulse rate error is ±2 Style:Right Ear pulse rate error is ±2 bpm or ±2% (select larger) * It is a perfect addition to a club corporate fitness recreation center school or hotel because the stout design will withstand hours of consistent use 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 *