NXT BIO Fit Cushion,18×16 is designed for deep immersion, support and skin protection for users at medium to high risk of skin break down. Supports up to 300 lb. Key features include soft density top layer for comfort and immersion, Blue Visco Gel Foam reduces heat buildup, medium Density Viso Foam provides improved support, positioning and immersion and firm HR Moulded Layer for support, stability and durability with SIT Technology.