The UltraSoft™ memory foam cushion conforms to the unique contours of each face—fitting 98% of patients. The permeable foam creates a uniquely natural, breathable seal that allows some excess heat and sweat to escape through the cushion without compromising therapy pressure. Created to reduce facial markings and skin irritation—even when sealed firmly against the skin. It's the perfect blend of personal comfort and performance.Small SKU # 63028 • Medium SKU # 63029 • Large SKU # 63030