Swiftwick's Aspire Zero Tab Sock is a versatile no-show sock we can wear for running, cycling, and most of our other favorite athletic activities. The thin profile creates a responsive feel and fits comfortably in any technical shoe, while the firm compression supports the arch and contours of our feet to reduce fatigue. On the rear of the sock is a new micro tab, designed to prevent contact between our heel and the back of the shoe, to ensure optimal comfort.