Kendall AMD Antimicorbial Foam Dressings feature 0.5% Polyhexamethylen Biguanide (PHMB) which is an effective antiseptic that targets and kills bacteria on contact. Kendall AMD Foam Dressings can be worn up to and provide bacteria protection for up to 7 days. PHMB destroys Gram+ and Gram- Bacteria, Fungi and Yeast. These foam dressings have a micro-structured, open-cell surface that absorbs wound exudate. The vertical wicking moves the fluid into the foam pad core. Available with or without an adhesive border. Available in several sizes: Non-Adhesive: 2" x 2" (# 55522AMD), 3" x 3.5" (# 55535AMD) and 4" x 4" (# 55544AMD); Adhesive: 1.75" x 3.25" (# 55523BAMD), 3.5" x 3.5" (# 55544BAMD), 3.5" x 5.5" (# 55546BAMD) and 5.5" x 5.5" (# 55566BAMD).