These "Mad Alchemy" 6 inch socks are part of DeFeet's Artist Series. The Aireator® platform goes well beyond typical sock construction. It's the original airflow design that changed how modern endurance socks are made. With its trademark venting mesh weave instep, durable 6" StayFast cuff, plated heel & toes that wears like iron, the Aireator guarantees long-lasting performance. Made with COOLMAX® Ecomade, the fibre that is made from recycled resources.