This is my first pair of Assos with the A Lock technology. Big guy, 6'3", 199 pounds and the XLG fits great. I've been wearing them for temps up into the 60's with a pair of knee warmers for everything above temps using cycling tights. I put them on with some creme and forget them. The shorts stay in place and have a great chamois. These are the best cold weather shorts I have used.