The Thorlo Experia XCCU was the best or near the best in every category that we tested for, landing it at the highest spot in our rankings of the best running socks. For this we are happy to award it our award for the Best Overall Running Sock. When it came to fit and padding, no other sock was better than the Experia XCCU. We loved how it came in a small size range that seemed custom tailored to our particular foot, rather than a wide range that our foot had to fit into. The sock was snug and supportive, but otherwise fit perfectly. We also thought that the light cushioning was exactly as advertised — targeted perfectly to only those areas that need it most, without leaving any area of potential rubbing uncovered. Not only that, but the looped fibers in the Thorlo pads did a great job of wicking moisture away from the foot. Overall, we don't think there is a sock that did a better job of meeting all of the needs of a trail or road runner, so we can easily call this the best overall running sock.
The Experia line from Thorlos has a variety of lengths. Check out the ankle-length Thorlos XCMU Experia for the same $15 or the crew-length Thorlos XCXU Experia for a slightly more expensive $17.