The VCI (Vapor Corrosion Inhibitor) Gun Sock seals out moisture. VCI penetrates into the smallest crevices where oils cannot reach, drive out moisture. Provides full protection by forming an enclosure around firearm from muzzle to butt. The VCI Sock, when used in a safe or cabinet, will offer additional protection to all metal items in the enclosed area. One size fits most firearms. Drawstring closure.