I bought these socks for a trip to the Boundary Waters. They are extremely warm and comfortable. I found that I could wear them all day and night and they wouldn't even start to stink. I found that I now wear them for everyday socks because I enjoy them so much.

Icebreaker Rules
Well...I must say that I'm a fan of Icebreaker products. I own multiple tops and bottom layers but this is my first pair of socks. They are impeccably made and fit the foot very snugly. No need to repeatedly smooth the sock down on your foot before putting your boots on. They have a great feeling of quality to them. This particular sock is a mid weight. It is nicely padded in all of the right places and gives the impression that it would stand up under a really long hike..I've only gotten in 5 miles max so far and they stood up beautifully. I know there are a lot of makers of wool products out there...In my opinion, Icebreaker is delivering the best quality merino wool products of anyone.

Great for Cool Weather
I haven't used these socks for hiking; Instead I use them fort all-around use during the cold winter months where I live. They keep my feet warm whether shoveling snow in tennis shoes (sometimes I'm too lazy to put on boots) or sitting at a desk in a cool warehouse where I work. I'm impressed with how they're holding-up and have no reason to expect they won't provide a long use-life. It's also worth noting that they're itch-free and the size medium fits perfectly on my men's size 9.5 foot.

Good temperature regulation
These are the best socks I have worn for temperature regulation. My feet are never too cold or too hot.

Great Socks!
I am a sock person, and I must say these socks are on top of my list. I had a pair of icebreaker socks before and they were great and these socks are just as equally great. They are very comfortable, warm, and my feet are able to breath well. I am not sure how long they will last but the older pair I had are still around so hopefully these will last just as long. Cannot say enough how great these socks are!