If you are prone to sweaty *cough* smelly *cough* feet, avoid Coolmax like the plague, for socks that is.

I find that Coolmax works great for T-shirts and shorts in the gym, but it is worthless for socks. They can't wick moisture as well in your sneakers or boots because the heat is trapped inside the shoe.

I find my Coolmax socks remain humid throughout the day (at the office and in the outdoors as well) with uninteresting results (...), so I would stick with a blend of cotton, acrylic, polyester, nylon and merino wool.