The first thing you notice is how soft these socks are. They reach a good way up the ankle and are quite chunky. As for keeping the tootsies warm, they are really effective. Forget all those cheap so called thermal socks you can pick up in markets and discount shops. I have tried them all in an effort to save money but they are all a waste of time. Try these and you will notice the difference.
An update...nearly two winters on, I can confirm these are long lasting. I have worn them constantly, except for a few months in summer and these have lasted really well. No holes yet, well,... except the one at the top through which you put in your feet.