The Dakine Cobra Half Hook Sizing Cover tailors your Cobra Half Hoof to fit a smaller foot. Allows for 2 smaller size adjustments. Use the cover by itself for one size smaller and then use the EVA foam sizing insert to make it 2 sizes smaller. Simply zip this cover over your existing Cobra Half Hook to fit smaller feet or adjust sizing for riding with out booties. Another bonus is that the cover provides more padding between your foot and the foot hook.