Quality construction. Fit is true to size vs. other "large" jerseys/jackets while still allowing room for a base layer (which I did wear). Neck was just tight enough to keep out wind without being too tight. (I'm a size 42 jacket with a 16" neck.) At 40 to 45 degrees with a moderate to strong wind, and mostly climb and descend riding, my upper body remained very comfortable. Neither warm nor cold, fully zipped. I was mostly dry after the ride except between center chest muscles where jacket was not right next to skin. My guess is that with a base layer, this would be good down to 35 degrees as long as you're riding somewhat enthusiastically.