Phenomenal jacket. Nice comfy fit & nice and light. Suuuuuuuper warm. I would not recommend wearing this if it is over 40F - you'll start sweating like a banshee. Also, in my opinion, no need for several layers underneath. I wear a single wicking base layer and feel the need to unzip a little. Speaking of zippers, the side venting zippers are fantastic. They provide relief when things start heating up. The zipper at the coller is not obtrusive. Back pocket was adequate for carrying a mini pump, smartphone (iPhone 6+), and other small support equipment.Highly recommend for those cool rides. Awesome jacket.This is just an awesome jacket. I (road) ride almost daily in NH through the winter, and his jacket really does the trick. The fabric is more wetsuit than an lined or insulated style jacket. It keeps you remarkably comfortable in the wind, wet and cold. A layer or 2 underneath or maybe some arm warmers are all I've needed in some pretty cold temps.