Originally Posted by
landdnl
My commute is 25 miles(12.5 each way) about 40 to 45 minutes in the morning(no traffic). It's possible that the skinfoil(s) might be enough, but going 25 to 35 mph at say, 25 degrees results is a pretty hefty windchill even when calm. I also like to do intervals also after work, so I might be out for 3 hours sometimes. The jersey(s) are slim cut, so even though I sized up I still need the baselayers as thin/warm as possible. That's why I went with the skinfoil for the long sleeve. No room for 2 ls base layers.
The problem is that it just doesn't really make any sense to put a windproof layer as the inner layer. The wind cuts through the outer layers and removes heat, the windproof membranes are far less breathable than less windproof stuff so you're still stuck with possible moisture buildup under the layer. It seems like it's the worst of both worlds - especially if you're doing high output stuff like intervals.
I own windproof "breathable" layers that I use in the winter (Minnesota), but I don't own any windproof base layers - but that's my opinion. A windproof membrane outer layer (like goretex active, event, etc) can still get a little clammy in not being quite breathable enough, but it is fantastic for keeping the wind out. Using one as anything other than the outer layer makes no sense to me. Either go with a windproof outer layer, or a more breathable but less windproof setup for all layers.