The SmartWool PhD Run Light Elite Micro was one of the most versatile and performing socks that we have ever tested. The sock was comfortable in the cold, heat, snow, mud and dry conditions. We wore it on several runs in a variety of circumstances. It quickly became one of our favorite socks because it was always comfortable no matter what condition or terrain we were running in. In the snow, the socks kept our feet warm and fairly dry. In the heat, and on dry trails the socks felt great and our feet never got too hot. If you are looking for a versatile all purpose trail running sock we would recommend the SmartWool Phd.
SmartWool is making a solid wool sock for runners. The durability and performance have improved greatly. With these improvements comes one of the only negatives we can think of, the price. Each pair comes in at $17.95.