A shaped sheet of heavy waxed cotton canvas. The idea is I fold this over a barbed wire fence to protect me or, originally, my dog from the barbs. Now, the idea that my dog will cross a fence where I have prepared a temporary stile suggests the makers have not met my dog. However, as a means of protecting my expensive breathable waders I can see where this comes in very handy indeed.

This folds small, weighs no more than an ounce or two, easily fitted into a jacket pocket. Surprisingly practical means of extending the life of a nice pair of waders.