My favorite mid-layer for snowboarding and when I know i'm going to active in the colder weather. The lighter fleece in the arm/armpit areas really regulates temperature very well as I get hot fast when snowboarding. Of the 4 or so mid layers I use for this highly active sports, this is the one I reach for constantly. Highly recommend it. I'm 6' and about 170 lbs and the medium fits great.