When I was out shopping for new winter pajamas at Target, I came across some sports-specific sweat-wicking long underwear. I can't remember what they call them, but they were in packages in the same rack as the regular long underwear (lingerie/pajama section). I bought a couple long-sleeve ones just because they were cheap, and tried one out last month when I was in Maine's blustery weather. It worked great! I haven't used it since, because it hasn't been cold enough here in CA yet. Just my $.02.