Great product
I was looking for a base layer for cool weather hiking but don't like compression clothes like Under Armor. So I decided to get these based on other people's reviews. I was more than pleased when these arrived and I tried them out. I am 6'3" and 185 lbs. These fit just right on me and exactly how I wanted them: Not too loose and not too tight. This allows freedom of movement. They are warm but breath so you don't sweat a bunch. If you do sweat, they wick away moisture. They are also extremely lightweight which is great for packing them at all times just in case you encounter unexpected cold weather.

Patagonia Capilene 2 Bottom
Lightweight, quick drying, great for aerobic activities when the mercury drops. I have had mine for five years and when they do wear out, I can recycle them through Patagonia. Can't beat a good performing baselayer that also has a conscious for the environment.

These are my second pair of Capilene pants. I also have a 3. I give a 4 for Comfort because I wish these had a bigger cuff on the bottom of the leg. I fear for stretching. But in all other ways they're perfect...like all Patagonia stuff.

Another Hit with the Capilene Series
I can wear these in any sort of weather. I love that they keep me warm without breaking into a sweat, yet comfortably cool when the mercury starts to rise. They do what they're supposed to, and they do it well. Don't waste time or money trying anything else. This underwear is wicked comfortable, comparable only to leather chaps made from clouds, delivered from the heavens.

Men's Capilene 2 Lightweight Bottoms
Like all the Patagonia products, the Men's Capilene 2 Lightweight Bottoms worked as advertised. I have a top base layer that's thicker than these and it would have been warmer. I don't usually wear a base layer under my pants, so even this this layer helped keep me warm and dry in the drastically varying conditions in Whistler.