McKesson Molded Foam Seat Cushion, 20 x 18 x 3 in, 1 Case of 4 Housekeeping Black * Extra wide for Hearing Aid Black * Extra wide for broader backs: Men's size 44+ and womens 18+ * Designed to increase comfort by aligning your spine and supporting correct posture * Unlike traditional L shaped chairs the S shaped frame of the Obusforme molds your spine into proper anatomical alignment * Muscles relax leaving you more comfortable and energized * Features molded impact resistant lightweight polycarbonate frame * Durable polyurethane foam protects frame and provides cushy comfort * Hypoallergenic cover can be removed and spot washed * With removable adjustable lumbar support pad to provide additional comfort for the lower back by supporting the lumbar curve * Use together with any Obusforme seat * Beautiful impact retail packaging *Obus Forme Wideback cushion are 19Ã x 7Ã x 21 Large 16 17Û * When sizing measure slightly bent underneath knee cap * Useful in the treatment of patella dislocation chrondomalacia patella and Osgood Schlatter s disease * Allows more flexiblity around the kneecap * As the kneecap is free from compression any tenderness or bruising present on the kneecap itself will not be aggravated * Captures body heat & increases blood flow * Allows skin to ventilate & release moisture * Shipping Carton Size: 12 L x 10 W x 6 H stretch nylon cover is breathable Designed to provide shock absorbency