Varilite Evolution Wave Bariatric Cushion is a cushion that helps to keep the person sitting on it comfortable and stable Why Buy Varilite Evolution Wave Bariatric Cushion? It has an adjustable skin protection cushion with a solid positioning base. It comes in three base styles- contoured, positioning wedge, and lateral positioning base. It has a PSV pressure setting valve which takes the guesswork out of cushion adjustment Who Should Buy a Varilite Evolution Wave Bariatric Cushion? People with a high risk of tissue breakdown People with symmetric positioning needs People with motor and neurological dysfunction due to spinal-cord injury, stroke, multiple sclerosis, cerebral palsy, and traumatic brain injury Cover The Evolution is available with a mesh or incontinence cover with breathable four-way-stretch material. Reticulated foam inside promotes air exchange and improves pressure distribution. The underside is a rugged nonslip material with hook and loop for added security. Evolution cover meets ISO 7176-16 ignition resistance standards for upholstered wheelchair components. Machine washable. Wedge A modifiable closed-cell foam wedge is available as an accessory with each Evolution. Our Wedge reduces the seat-to-back angle, which increases the weight-bearing load on the back of the thighs and decreases the load on the buttocks. The 2 inch (5 cm) tapered wedge trims easily for custom fitting to meet individual needs. Support Information: Varilite Product Support Page