I like the fact that these socks are thick enough to comfort my feet, and allow them to breathe at the same time. Although, I should share that I will know more once I use them through the upcoming Summer. So far, the only thing that I can share which might be negative is that my foot is 10.5US and these seem ideally suited to 11US. I would think that anything beyond that would (no pun), be a stretch. Also, you can expect many major "fuzzies" on the bottom of your feet when you remove these socks after a long day. However, given the heavy construction, I'm sure that these socks are well worth the $$$ as I expect them to last a very long time.