KerraLite Cool® Hydrogel Transparent Dressing. 3″ x 3″. Adhesive border. KerraLite Cool is a soothing, debriding and moisturizing dressing that provides the ideal environment for managing lightly exuding sloughy wounds. KerraLite Cool is a strong, transparent hydrogel that is impermeable to external contaminants such as bacteria, but permeable to moisture. KerraLite Cool Dressings are designed to: Help to improve healing of lightly exuding wounds; Clean the wound, debriding necrotic tissue; Increase granulation tissue of chronic wounds; Soothe and cool to minimize discomfort; Protect against wound dehydration; Barrier to the growth of bacteria; Help prevent maceration of the peri-wound area. UOM: 5/BX.