On occasion a product is released and becomes an instant classic. This is a prime example of that phenomenon. The DeFeet Aireator sock was introduced years ago as the first and original air-flow design sock. It was incredibly well received and is still hugely popular today. The innovative Aireator is still is one of the best designs for wicking, drying, and breathability. Hands down one of the most durable socks made - they last forever! The double hemmed, Stay Fast cuff is guaranteed to never sag.