The Beretta Gun Sock is the first gun sock designed for the transport and storage of firearms under wet field conditions. Unlike silicone-based gun socks, the Beretta VCI (Vapor Corrosion Inhibitor) gun sock does not trap moisture. The VCI technology forms a protective chemical barrier that stops rust and corrosion from occurring making it perfect for long-term storage. It is made of soft spun yarns and will not abrade wood or metal finishes.