"An awesome jacket! Good for me in weather around 0ºF."
I got this jacket because the ones I own weren't warm enough for below 20ºF. After wearing this jacket in weather around +/- 0ºF the past week, I am definitely satisfied with my purchase.I am 6' tall and weigh 175lbs. I went with an XL because my arms are long and I like my clothes a little big. For a normal fit on a person this size, L probably would be good. There is room in the neck for a scarf and I can wear hoodies underneath without being strangled (this may be different for an L).I've only been outside for under an hour at a time so far, (walking between classes, walking the dog, etc.), but in 0ºF weather I experienced no heat loss, with a sweater and thermal shirt underneath. The jacket blocks wind nicely and the pockets are warm. In weather around 30ºF the same combination got a little hot after 30 min. Not a problem because I just removed a layer of clothing.