The SacroEase Sports Portable is designed to give superior back support while still being ultimately portable. The lumbar pad is on the inside; the bottom is skid and wears resistant with water resistant durable fabric as the main covering. The strapping is adjustable and allows this unit to be a “stand alone” product – requiring no back to lean against. A steel frame and rubber stays help this back cushion provide far more support than any foam only products. Complete with internal comfort memory foam, this seat will provide maximum comfort while supporting your spine.