Carradres Hydrogel Sheets: A Sterile, Hydrogel Polymer Sheet Consisting Of 89.5% Water In A 10.5% Cross-Linked Polyethylene Oxide Matrix. It Is Backed With An Inert Low Density Film That Controls Water Vapor Transmission During Storage And Makes The Gel Easy To Handle. It Has A High Specific Heat To Provide A Cooling Effect, Is Hydrophilic, And Will Absorb Three Times Its Weight In Fluid. It'S Clear To Allow Visualization Of The Wound And Has Gentle Adhesion For Sensitive Peri-Wound Skin. 4" X 4" Sheet.