I just took this jacket on a 5 day riding bender in CO. Conditions were cold (-3 air temp with -30 wind chills) and the jacket kept it toasty. The liner adds a lot of warmth without adding bulk and has its own mesh vents that line up with the jacket's zip pit vents. It is a nice, subtle touch that really works well when you need to cool off a bit. I am 6'2" with longer arms and normally I need an XL for sleeve length, but a large fit me great. Perhaps 686 added a bit of length in the sleeve??? Only con is the integrated wrist gaiters pull at the webbing between thumb and finger because of the seam placement. Other than that, jacket rocks. Durable, watertight, warm, low-profile. Don't hesitate, but it.