I was wondering what the difference was between these bottoms and the Icebreaker Oasis bottoms since they are both 200 g. These don't feel like standard Icebreaker clothes with that smooth merino wool feel Icebreaker stuff usually have, these are SOFTER! These were a little less expensive than the Oasis ones, so I went for these. Anyways, they feel great and fit under standard pants and ski pants. I was torn between size XS and S (5'1, 115 lbs, muscley quads usually makes me get size S), so I went with S and it fit well at first (not super tight, but more or less fitted), but after wearing them all day under some pants I realized they stretched out like crazy, saggy butt, saggy knees, etc. This bummed me out because I was hoping to wear these as tights under a skirt or dress. I even threw them into the dryer, which I never do with any of my merino wool clothes, and it didn't really shrink much to make a difference, still stretches out by the end of the day. Oh well, should have gone with the XS!