Rust preventing, non-abrading, innovative Unlike silicone-based gun socks, the Beretta VCI (Vapor Corrosion Inhibitor) gun sock does not trap moisture VCI technology forms a protective chemical barrier that stops rust and corrosion from occurring This technology works so well, the sock is perfect for long-term storage Made of soft spun yarns Will not abrade wood or metal finishes Length: 48 inches 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.