Seirus Innovation 4150 Cat Tracks Boot Sole Protectors for added Comfort and Traction EXTENDS BOOT LIFE - Cat Tracks Improve traction and extend the useful life of your ski boots with this slip on walking sole for your boots PREVENTS BINDING MALFUNCTIONS - Caused by wear and gravel contamination of boot soles FITS ALL MAJOR BOOT BRANDS - Recommended by all major boot and binding manufacturers COMFORTABLE - Adds cushioned walking comfort while eliminating damage from gravel and sand PRACTICAL AND CONVENIENT - Fits into your pocket when not in use. Great for winter outings, skiing, snowboarding, hiking, snow shoveling