Silver Alginate Dressing Algicell® Ag 4 X 8 Inch Rectangle Sterile1. 4% ionic silver provides long lasting, measured release for 7 day effectiveness Comprised of a proprietary blend of mannuronic (high gelling) and guluronic (high wet strength) alginic acids designed to gel well while keeping its physical integrity for intact removal High absorption capacity also helps to reduce the risk of tissue maceration and allows for increased time between dressing changes Does not leave any silver coated nylon thread residue