The Combo T-Foam Cushion is a foam seat cushion designed to provide pressure distribution, fight pressure sores, and provide superior sitting stability. The cushion is made of trilaminate construction that combines the best of T-Foam in a single cushion. The top layer of the Combo is 1-inch thick T-Foam; the middle 1-inch thick layer is medium grade for full flotation, regardless of user weight; and the base layer is made of high-density foam that will not bottom out under hot, humid conditions. T-Foam combines the body conforming pressure distribution of liquid or gel-filled cushions with the breathability of open-cell foam. T-Foam breathes to minimize heat built-up and perspiration. This material is fire retardant. The cushions are covered in breathable, waterproof, stretchable AliTex. CAPACITY: For users weighing up to 200 pounds. DIMENSIONS: 3 x 16 x 18 inches (##1175) or 2 x 16 x 16 inches (##1176).