I wore these today on a 27 mile ride with temps around 32 degress, windchill in the mid 20's, and no sun. By the end of the ride, my legs were getting cold, but that might have been due to my upper layers and feet getting cold. These are very comfortable. I am 6'1" and about 160lbs and had to go with the XL. The L fit in the contour bib, but the fabric on these did not stretch as much and I was not able to pull the L size up over my legs enough. I wore these with temps in the lower 40's and was very comfortable. The fabric does a good job at blocking wind.