Highly Effective, Low Toxicity AntisepticKendall AMD antimicrobial foam dressings have been developed to support your efforts in managing both moisture and bacterial balance. The dressing is an open-cell, polyurethane foam dressing and is impregnated with 1/2% polyhexamethylene biguanide (pHMB) that is a highly effective, low toxicity antiseptic. The dressings are effective against gram positive and gram negative bacteria. They also work against fungi and yeast. Antimicrobial polyurethane foam dressing. Proven effective against bacteria for up to seven days. Provides an ideal healing environment by simultaneously managing moisture and bacteria in the dressing. As the foam dressing absorbs exudates, polyhexamethylene biguanide (pHMB), a powerful yet safe antiseptic, targets and kills bacteria on contact.