First ride with jacket was with 30 degrees, 15-25 mph North wind. Had to open a vent after a few miles. Wore a long sleeve baselayer beneath jacket. The outer shell really is good at stopping the wind. I am 5ft. 7 in., 160 lbs and got this in Large. Fit is nice. I seen a review on Wired.com last fall for this jacket, but at initial pricepoint, there was no way I was going to get it. Last week when it came up on Bonktown, I couldn't believe my eyes! Keep up the good work, guys! I've been able to build my cycling wardrobe with your help!