McKesson Square Sterile Adhesive Acrylic Foam Dressing with Border, 4 x 4 Inch, 100/CSPRODUCT FEATURES: May be used as a dressing under compression wraps or unna boots Breathable and moisture and bacteria resistant outer film layer maintains a moist wound environment to help promote healing Absorbent inner hydrocellular foam pad is highly conformable Skin friendly acrylic adhesive helps ensure the dressing remains securely in place Seals the wound margins to help prevent exudate from leaking on surrounding tissue, minimizing the risk