The Banded Shell Pack is constructed from durable neoprene and is made to attach to waders or blind bags. There are 12 shell sleeves on each side of the pack with a zipper compartment in the middle. The pack easily clips on with two plastic hook clamps that are attached to heavy duty nylon straps. If you regularly wear waders or need quick access to your shells, this handy shell pack was designed specifically to meet your needs.