Sponge Size (LxWxH): 20" x 20" x 6" These 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!