Browning's VCI (Vapor Corrosion Inhibitor) Gun Sock seals out moisture from your firearms. VCI penetrates into the smallest crevices where oils cannot reach, driving out moisture. It provides full protection by forming an enclosure around the firearm from muzzle to butt with its drawstring closure. The VCI Sock, when used in a safe or cabinet, will offer additional protection to all metal items in the enclosed area as well. One size fits most firearms.