Thanks john, how does it hold up in very cold temps and high winds? I know it's a base layer, I'm just wondering if you had and cold spots coming in through your outer wear if it is good at reducing that chill.
Well, it doesn't get cold here the way it might in some places, nor do I get as much outdoor time as some here, but it does get miserable cold, with a lot of wet thrown in for good measure. In any case, YMMV.
The Capilene is not a 'windstopper' layer. It is fairly dense, so does a reasonable job, but you need a shell on top to keep a strong wind from coming through.
I noticed that layering over a silkweight layer is much more effective in general warmth, as well as blocking drafts than just wearing the heavier layer.
Personally, I think it is very effective.
-john