I bought this 260 gram set for a ski trip to Beavercreek Colorado and they performed flawlessly. I wore only this set beneath Columbia bugaboo ski pants and a Columbia interchange ski jacket, and I did not get cold while skiing or riding to lift in single digit temperatures and snowing. I ordered a medium top & bottom, I’m 5’7”, 175, medium build. The fit is athletic but not tight, the merino wool is not itchy, and is semi-stretchySee full review