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.