DeFeet Aireator 5 Crash Test Socks. The immensely popular DeFeet Aireator Crash Test Dummy socks are back! DeFeet's renowned Aireator sock features the original airflow design that changed how modern endurance socks are made. With its trademark venting mesh weave instep, StayFast cuff, plated heals and toes that wear like iron, the Aireator guarantees long lasting performance.
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