I'm planning on a late winter start for next year's NoBo AT through-hike, and I'll need warmer base layer clothes at the start. I'm trying out various options, and I noticed there are some wicking T-shirts with extra-long sleeves that cover half your hands, with holes for the thumbs. Does this little bit of extra coverage really make a difference? I can maybe see the value in keeping drafts from getting to your wrists, but I don't know if this is a useful feature or just a gimmick.
Your thoughts?