I have been dabbling with calve compression sleeves for the past few years while running marathons and ultramarathons. I am not sure that I have empirical data, but since I started using the calve sleeves, I have had better muscle recovery and no calve cramping while racing. The only challenge was that I needed to wear a compression sleeve and running socks. Injinji has come out with a compression sock that I hope can do both. I will be reviewing the Injinji Ultra Compression OTC socks over the next few months. Read on for my initial thoughts.