The CXR Cushion is designed to minimize coccyx pressures through a combination of 2" Cells under the coccyx area, and 4" cells throughout the remaining cushion surface. The dual valve configuration allows you to adjust both the 4" and 2" cells separately achieving individualized immersion, and ultimately constant low sitting pressures. The 2" cells allow for immersion while also providing added relief and protection under the coccyx area. 16 standard configurations address specific individualized seating needs. Ideal for the individual who has, or is at risk for the development of pressure ulcers.