- Familiarity: I've put it through the wringer
These are high quality socks. The PhD style are designed to fit more securely with the idea that they wont slide around in your shoes. So these socks will fit tighter, but as long as you don't throw them in the dryer, Smartwool's sizing recommendations are spot on.
The merino wool blend on these socks is very breathable, wicks well and dries quickly. The also have great durability and don't pill up when washed. My feet run hot, and the medium weight is a bit too warm for me from mid spring through late fall, but I love them when the temperature dips! Those with normal feet would probably like them for everything but the summer.