The Defeet Aireator 6 Framework Sock has an optically illusive design that is cool and funky. The elegant structure is a result of the foundation of the framework and the Aireator platform goes well beyond typical sock construction. It's the original airflow design that changed how modern endurance socks are made. Defeet has created a cycling sock 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. Defeet Aireator 6" Framework Sock Features Optically illusive Aireator platform Original airflow design Trademark venting mesh weave instep Durable 6" StayFast cuff pPlated heel & toes Aireator guarantees long-lasting performance Made with COOLMAX Ecomade Composition: 60% Nylon, 39% COOLMAX EcoMade, 1% Lycra "