Kerlix™ AMD antimicrobial dressings super sponges are impregnated with PHMB (Polyhexamethylene Biguanide), a powerful yet safe antiseptic that has a broad range effectiveness against gram positive and gram negative microorganisms including some multi-drug resistant strains such as MRSA. In addition to its antimicrobial capabilities the Kerlix™ AMD antimicrobial dressings super sponges are a superior primary and secondary dressing designed to absorb and transfer exudate away from the wound. Medium, 6" x 6-3/4" (15.2 cm x 17.1 cm).