Quality socks. They lasted me a few years before they started to wear out. I'm on my feet 12 hours a day with heavy use. For the most part they keep me warm outside in inclement weather during the winter months and keep me dry during the summer months. Socks usually wear out first because the back of the heel rubs against whatever shoe you use, they're no different but they last longer than other socks I've had. I highly recommend these socks