What is the only thing that can make a DeFeet sock better? Add a Voler logo. The Air-E-Ator® has set the standard for performance athletic socks. The 'King of Multi-Sport' Air-E-Ator® is a true original. The Stayfast™ cuff provides a secure, durable, dynamic fit, and the sculpted Air-E-Ator® mesh weave travels all the way around the sock to aid airflow and moisture transfer. En-Duro-Skin™ construction reinforces the external heel & toe "puncture" areas while Achill-E -Shield™ strengthens the high-stress area of the Achilles tendon area. The Sole 2™ system ensures that durability & wicking co-exist in the all-important sole.