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. Instead, it uses VCI technology to form a protective chemical barrier that stops rust and corrosion from occurring. This technology works so well, the sock is perfect for long- term storage. The sock is made of soft spun yarns that will not abrade wood or metal finishes.