Musher's Secret - The Invisible Dog Boot! All-season paw protection for your dog. Made from 100% natural waxes, Musher's Secret is a dense, barrier wax that forms a breathable bond with your dog's paws. Originally developed in Canada for use with sledding dogs, it provides tenacious protection even in the most extreme conditions and temperatures. Musher's Secret puts a barrier between paws and off-road or street hazards, so the trip will be worry free.