I live in Thunder Bay, ON. Winters here can drop as low as -50 with windchill. This looks and feels like a light spring jacket, but wow, with a base layer and a 300 weight fleece (Patagonia R3) underneath, I felt invincible outside all winter long. In a downpour, although it eventually soaks through and gets a bit heavy, you never really feel wet.
This review was written in the old system and had content requirements that are different than reviews written today.