If you have a Bass Pro Shops store near you, check out their Red Head Lifetime Hunting Socks. They are made of 88% merino lamb's wool, 10% stretch nylon, 2% spandex. The socks are on the thicker side and provide excellent cushioning. They run $9.95 a pair and the nice thing about them, is that they are guaranteed for life. Wear them out, get a hole, just bring them back and they will replace them, no problem. I have used them for several years and love them.
Red Head Lifetime Hunting Socks Pete