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

If for any reason you are not satisfied with your purchase, you can return the product within 30 days of delivery and request a refund.