Mark K.wrote a review of Castelli Alpha Jacket on October 31, 2014
Familiarity: I've used it once or twice and have initial impressions
I have one ride on this jacket but since it is a brand new item I thought someone might appreciate a review. I ride well over 2,000 miles during the colder months here in Northern Virginia.
This jacket takes the normal thinking on winter gear and expands and develops it. The parts that face the wind stop wind. The parts that don't face the wind breathe just the right amount so you can vent excess heat. But sometimes that's not enough. So the windstopping layer does as advertised, and you can unzip it to vent out even more heat and still have the inner layer zipped up to keep you just warm enough.
That's what I want in a jacket like this. It needs to keep me warm on the ride in which can easily be below freezing. It needs to not be too hot on the ride home which can be between 50 & 60 F. That I can't say yet but it does absolutely brilliantly at being just right in the 30s and 40s.