Excellent jacket that moves with you on the bike. I usually wear a size L in the Men's RBX line tops, however I found the L to be too constrictive around the chest and shoulders and settled on the XL instead, I've noticed a lot of the winter gear fits tighter in general. The jacket has the perfect amount of insulation for rides around 20-50f, and it does a really good job of venting excess heat and repelling light moisture. It also looks really dang good on me, I bought the blue and love how it looks. This jacket does not pack down small so don't expect it to stow away easily, I throw a seat bag on my bike when I'm wearing it in the event I want to remove it. There aren't a lot of features to talk about, it has pockets on the back, but it is a fairly straightforward item. The material itself is soft, comfortable, and has a bit of stretch to it.
For reference, I am 6'1" and 205lbs with a fairly athletic build.