Unique construction of high resilient (HR) molded foam provides optimum seat stabilization, positioning, pressure reduction and correct seating posture. Unique Polymer bladders for pressure reduction. Soft, durable, sealed inner liner provides protection from incontinence. Removable and replaceable cover is washable, flame retardant, reduces pressure, reduces friction & shearing, is urethane coated for water resistance and vapor permeability, is constructed with a non-slip bottom. 1 Year Limited Warranty on cover and cushion. 22 Inch x 18 Inch x 3 Inch Weight Capacity: 350 lbs.