As the initials in the sock name implies, these were developed for Alberto Contador and then used by the rest of Team Tinkoff-SaxoBank. The 9cm cuff has all of the knitting and elastane running in a vertical path to promote blood flow and circulation. The top of the instep has an aerated web mesh pattern for ventilation while the entire bottom sole has and added thin layer of material to prevent hotspots. The final touch is an elastic instep compression band. This aids in both fit and circulation. Overall, the AC Vuelta is thin, low volume and soft to the touch. No matter how you slice it, this sock is a winner by anyone's standards. Rarely do you see this much time and effort go into a sock.