Closed Cell Sponges are made from a lightweight, radiolucent, non-porous foam. The perfect solution for any positioning need! These positioning sponges are entirely fluid resistant, easy to clean and extremely durable! Featured in a non-coated, premium charcoal grey color. | 100% Radiolucent Artifact free imaging Cleanable, fluid resistant surface Lightweight and comfortable The number one option in positioning sponges!