As the 'original air-flow design sock', the Aireator is the sock that kicked off the air-flow rage years ago. Today, the Aireator still leads in durability, wicking, drying, and air permeability. Some like 'em high! In recent years a lot of 'high-profile' athletes have asked us to create an Aireator that rides taller. Our knitting engineers came back with the HIGH TOP - two heights, a 5 or 4 inch tall single-layer cuff. On the Aireator, it's a match made in heaven.