I'm going to start commuting to work by bike a couple of days a week and need to get some appropriate clothing. Unfortunately I can't afford to get a nice merino wool baselayer right now so have been looking at alternatives. I've heard some good things about the C9 products available at Target but am wondering which would work best for my situation. They have a few different long sleeve shirts available, some are compression while others have a more traditional fit. Which would be best for winter riding? Compression would probably fit better since I wouldn't feel so bulky with all my layers, but I wasn't sure if the compression would do more or less when it comes to keeping me warm.