Not much needs to be said about these Icebreaker longjohns. They are very comfortable, don't stink and keep me a perfect temperature during most activities. I have yet to use an Icebreaker product that hasn't been great. The quality seems on par with my other Icebreaker gear, which has been great.

Best underwear I have ever owned. No itch and very warm. When a cool day quail hunting goes to sleet and snow better have these woolies.

I also own the top. Both top and bottom are very soft, comfy, warm, and wick moisture well.
I'm 6'-1 165 lbs, I wear a large in both the top and bottoms. They fit closely but not as tight as my under armor. After owning these I'd pick merino wool over synthetics whenever possible.

I have a couple Icebreaker tops and got these too. Merino is it, forget synthetics. When I ski I have on Lorpen socks, Icebreaker tops and bottoms and a merino beanie( check out Arc'teryx). Head to toe , everyday.
They fit very well, I got smalls and they are plenty long. They would probably fit anyone well over 6'.

This pair definitely didn't disappoint. I wore them under my jeans and it was never uncomfortable (they are quite comfortable actually). For the most part, they kept me as warm as I needed to be and I never felt too warm in them (granted the most strenuous thing I did was a short hike up a hill). I usually went a week before washing them and I had no issues with odor. Definitely recommended. I thought the fly would come in handy but I never used it.

A great product, the best base layer that I've ever worn. Very comfortable and soft. Really warm.

I am not a huge fan of the icebreaker products. Was my first set of icebreakers and wanted to try them based on the reviews they had been receiving. Totally love them and will be buying more of them in the future.

I wore them for two weeks, all you have to do is shake them out, air them out for a second, and the smell is gone! It's amazing and I never would have believed it.