A New Closed Cell Foam Kit from Z&Z Medical. This closed cell kit offers you one Weight bearing stand for ankles and feet, and 4 rectangles of various sizes. Closed Cell Sponges are made from a lightweight, radiolucent, non-porous foam. They are entirely fluid resistant, easy to clean and extremely durable! Featured in a non-coated, premium charcoal grey color. A great addition to your positioning sponges.