Protect your ski boot soles from unnecessary wear and keep bindings functioning safely. Cat Tracks slip onto the sole of your ski boots before walking on asphalt, concrete, or gravel, preventing the damage and contamination that can cause boot and binding malfunction. They improve traction on slippery surfaces for added comfort and safety, and when not in use they fold up small enough to fit in a pocket or under your snow gaiter. Recommended by many leading boot and binding manufacturers as a way to extend the life of your boots and maintain safe binding compatibility.