Antibacterial Foam Dressing McKesson 4 X 4 Inch Square Non-Adhesive without Border Sterile Provides fast-wicking action, superior aeration and excellent absorbency Promotes healing through a moist wound environment Helps prevent recolonization Reduces the risk of maceration Conformable Waterproof and bacterial barrier PHMB (polyhexamethylene biguanide) kills and inhibits the growth of bacteria 4 x 4 inches