-6 Fast Feet Booties
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For athletes searching for that last bit of performance gain Wind tunnel tests showed up to a 6-watt savings at 45 km/h compared to a normal sock Silicone-coated stretch fabric over the shoe smooths out airflow Engineered grooved Lycra® on ankle portion helps detach airflow Flat polyurethane tape at top to keep shoecover in place YKK® zipper