...hot as hell!
So, I bought this for an upcoming trip to colder climates but decided to run it through a couple of nights back and forth to work to try it out.
Southern California, 50 degrees at night, walking two miles to work in a light rain. Soaking wet by the time I got to my locker, not from rain, but by sweat. AND  the underarm zippers were open for ventilation.
I guess it is better designed for light snow use, so keep that in mind when purchasing.