Need a morning jacket for spring/summer/fall.....this is perfect-I like this brand, fit slim but comfortable. Excellent, "just enough" warmth. I also own the next one up, the Atom LT (late fall/winter/early spring) -I'm 5'10", 180#, waist 33. The Large fits like a glove and I bought this for lightweight backpacking and morning dog walk routine. It breaks the wind, sleeves are long enough to make sense and has proven to be enough water repellent for a quick morning shower on the dog walks and the Lampyre color is a cross between Chartreuse and lime green. Perfect for visual aide in the neighborhood morning traffic. -I would recommend and will to friends.