I have been using Thorlo socks exclusively for over five years. I train daily and Thorlo products are excellent in terms of ventilation and cushioning. The dilemma is always cost and wear and tear. I am not satisfied with the wear and tear. After limited use, I noticed heel cups where my shoes rubbed against my socks. It was typical and not just a couple. At thirteen dollars or more for a pair, these socks should be worn better. I switched from the more durable Thorlo running socks to golf socks because the running socks were too thick for the humidity here in Florida.