The Smartwool PhD Run Light Elite Micro was one of the highest scoring running socks in our review. It is unique for its use of Merino wool as the main component of the fiber blend, rather than some form of polyester like the majority of socks we tested. It is a very light sock that uses minimal amounts of targeted cushioning only in the areas of most need in order to protect the foot in an optimal way for running while still staying light and cool. The merino wool is used in the padded areas and does a great job gripping the foot, wicking away moisture from the inside, and is supremely comfortable against the skin. This sock has a nearly perfect design for a running sock, and is hard to beat. Its only downside is the price, which is to be expected considering the liberal use of natural fibers. As one of the highest scoring socks in this review, the Run Light Elite Micro is one that we wholeheartedly recommend.
If you're looking to add some different lengths to your sock quiver, have no fear: SmartWool has tons of options. From the short PhD Run Ultra Light Low Cut Socks for $16 and the PhD Run Light Elite Mini Socks for $18, to the longer PhD Run Ultra Light Mid Crew Socks for $19 and the fun PhD Run Light Elite Pattern Crew Socks for $22.