This McKesson Premium Molded Foam Cushion features a 3-inch design that includes a pressure-sensitive, molded, high-density, polyurethane foam topped with a gel-infused, open-cell visco/memory foam layer for breathability; the gel acts as cooling agent for temperature control and mitigating perspiration. It comes with a waterproof, low-shear, stretch nylon cover which allows air to pass but resists fluids for lasting breathability, comfort, and the durability to withstand daily use and patient incontinence. This unique, molded cushion is specifically designed to optimize pressure relief by allowing the user's pressure points to "immerse" into the gel-infused, visco-foam top layer while molded leg troughs promote thigh alignment and postural symmetry, and a raised front ridge promotes proper positioning and control sliding. Its high resilient material is also designed to maximize shock absorbency and provide pressure relief for up to 275 pounds of body weight while adjustable safety straps buckle to maintain appropriate position and add security.