This jacket is really awesome. It's crazy how cheap it is. I was expecting something that looked really cool but wasn't the most practical of garments. I was very wrong. The material is very flexible and the fit is superb (I'm 5'9 I got a med.). I took it for its trial run today at work (courier) in the mid 30's. I could not have been more pleased. At first I was worried about layering but unless it's in the single digits, you wont need more than t-shirt or two. Despite it's warmth, this thing breaths like a champ when your heart rate spikes while spinnin down a hill (I feel like fixed gear'ers are the only people that would get this jacket). The huge front vent is way more effective than pit vents in my opinion plus the zipper is waaayy easier to get to when your actually riding. When the top is fully zipped it covers your neck and chin very well and the diagonal zipper never cause a problem with uneven flaps. I never even noticed it. This thing makes me want to get on my bike in the shittiest of weather. Oh yeah, did I forget to mention that it sheds water like a poncho. I'm sure I'll have to give it a spray (waterproofing) sometime down the road but for now bring on the aqua!