Merino wool is my go-to for base layering.These bottoms are very light, yet very warm. And wool won't get as funky(stinky) after a couple days of use without washing as well as staying dry. Overall I'd say my delicates are happy.
So this will be the second pair that I have bought, just in a different color and weight. I have the 250 for the cold weather and they are amazing! I used them for skiing, walking around town in blizzard like conditions on the east coast (I am a west coast guy so anything under 50 degrees is freezing)..haha. I need something that is more for those cold, but not so cold days for hiking and if these are anything like the 250's I have...they will be awesome and I am going to give them a run for their money in Patagonia and will add more to my review to see how they hold up for the 5 day trek.