What if a sock could make a shoe function better? With S-PHYRE Tall Socks, it can. By looking at the shoe/sock interface and applying our linkage effect approach, S-PHYRE socks combine thermoregulation, comfort, ankle roll stability, and heel slip-resistance with an extra-tall cuff that’s guaranteed not to droop. Asymmetrical structural weaving of proprietary yarns provide guide rails for proper foot alignment through the entire 360-degree crank rotation. They look great with S-PHYRE shoes, and work even better.