Corrosion during storage can be a real problem for rifles and shotguns. To prevent this, KleenBore has applied Vapor Corrosion Inhibitor technology to a convenient and easy to use gun sock style cover. Vapor Corrosion Inhibitor technology penetrates into the smallest cracks and crevices of firearms that oils may not reach, offering unbelievable long term protection against corrosion. Gunny socks also offer a cushioning layer of protection around your firearm.