Key Features:The original DeFeet sock the Aireator has been consistently upgraded and remains the gold standard of cycling socks.Affordable and incredibly durable Aireator’s are the most popular cycling sock the world has ever known.DeFeet Aireator mesh for superior breathability and comfort the first sock to incorporate this type of open-mesh construction.Eco-friendly: Made from recycled water bottles in North Carolina USA.Great for running hiking and on the bike Machine wash cold tumble dry low. No bleach softeners or harsh detergents.60% Nylon 39% Recycled Polyester 1% Lycra