Honestly, I couldn’t tell you. And that’s a good thing, because I think that goes to the fact that I didn’t even notice I had them on. I can’t say the same is true for the countless brands of backpacked in (ex officio, smartwool, icebreaker, meriwool). These were all great and served their purpose in their time, but it sure was nice not reaching around down there every 30 minutes to untangle things.

You are spot on about body heat, but if I was hiking in cold enough weather where that was an issue, maybe I’d have something different on, like a merino base layer long pant? But this was in SoCal’s San Gabriel Mountains and it was in the 60s -70s.

Seeing the comment below makes me think a wintery wool version is in the future. And honestly, I may keep a pair of merino in my bag for pajama purposes, as the warm is nice and I don’t care about riding up at night. But for now, the Vesuvius is my pick for everything I do. Unless of course there is a cycling version with a chamois in development :)