Being a motorcycle rider who refuses to stop riding in the cold weather, I own several sets of thermal under layers. The Duofold Expedition weight bottom turn out to be one of the warmest pair that I own and very comfortable, on par with another pair that is motorcycle specific which cost twice as much. I wear 32/30 jeans and the med. fits good, length and waist are perfect. I don't see the point for the draw string but it doesn't get in the way.