Bulldog's Gun sock is excellent for long term storage. It is constructed of a moisture resistant, soft, thick knit fabric which protects against dirt and scratches, while the silicone treatment helps protects against rust.
Specifications:

Type
Color	Black
Dimensions	52" x 6"
Material	Knit
Finish
Airline Approved
Pressurized
Hardware
Lockable
Proofs	Moisture-Resistant
Padding
Crushproof
Guns Held	1
Floatable