I took this hoody to Mt. Whitney where the temperature dipped down to the teens. I wore it with a base layer underneath up to base camp and kept me warm and breathed exceptionally well. The next day up to the summit I wore the hoody and my Patagonia Houdini windbreaker and was very comfortable in the teens with 40+ mph winds.
This review was written in the old system and had content requirements that are different than reviews written today.