I commute on my folder anywhere from 3 to 10 miles depending on my mood or where I decide to get off my train and jersey weather was pretty rough last year. I have two carhartt jackets that I usually wear. One is thin and looks like a motorcycle jacket but fares well up to about 45ish. The heavier one I put on when it gets real cold. My question is, they both are a bit bulky. Do bike specific jackets do a good job and are they really worth the premium price? I commute so I try not to look like I'm training for the tour de france but if prefer to be a bit more streamlined. Any suggestions?