Silver Hydrofiber Dressing Aquacel® Ag Advantage Surgical 3-1/2 X 12 Inch Rectangle SterileAQUACEL Ag Advantage SURGICAL cover dressings are sterile, post operative dressings comprising an inner (wound contact) non woven pad composed of 1. 2% ionic silver impregnated sodium arboxymethylcellulose fiber with added ethylene diaminetetraacetic acid disodium salt (EDTA) and benzethonium chloride, stitched with nylon and elastane Pad is held in place between a top layer of hydrocolloid bound to an outer polyurethane film and a windowed skin