Improves the comfort and support of your existing wheelchair back by eliminating the hammock effect. Provides proper patient positioning to maintain spinal and shoulder alignment and superior pressure redistribution to prevent skin breakdown. Comes with either a fixed or adjustable lumbar support and is easy to install. In addition, it is available in a dual-zone design which combines the unmatched support of Medflex® foam with the therapeutic pressure redistribution qualities of Viscotec® foam. The wheelchair back cushions (E2611-E2612) is designed for a patient who has a wheelchair and meets the Medicare coverage criteria. The use of these products provide better sitting tolerance and comfort for patients requiring a wheelchair.