This is the first pair of insulated bibs I've purchased and I am very pleased. Tried these bad boys on a century ride in 45 degree F weather for 6 hours in pouring rain. It almost felt like my legs were dry. Very warm and can be paired with knee or leg warmers to extend their use. I am 5'9" 160lbs, the large is a little more relaxed than I'm used to but still fit well. I love Giordana and RealCyclist! Best shorts for the money for sure.