Sacral Silicone Superabsorbent Foam Dressing 9.2" X 9.2" (230 x 230 mm) Central (Core): 6.7"x6.5" (170 x 165 mm), Central Thickness: 5 mm, Box of 5; Composed of 5 Layers (from the wound side to the surface area): -Porous Silicone Layer -PU Foam Layer -Thin Non-Woven Layer -Ultra Absorbent Layer -Outer Water Proof/Vapor Permeable PU Film Layer. For Sacral Wounds.