This is an extremely warm jacket. I bought to be sort of a do-all layer to run with only merino layer beneath, and it is perfect for that. It cuts the wind and is easy to pull on with the side zippers opening all the way up to the pit. It also airs out nicely since you can unzip to the waist. It is pretty heavy tho, I wouldn't want to pack it into the backcountry. It also doesn't dry very fast if it gets wet on the inside, however in the sleet and snow it sheds a lot of moisture.