At 5'11 a "large" fit very well. The pants were just a little long. But the elastic bands at the ankles and wrists helped the fit. The material is reasonably warm. I have been running in weather in the 40s. The collar also helps the warmth. I am not delighted with the gray color in the gray/ maroon option. The ad suggested that the running suit had a zip pocket in the pants. There was no zipper anywhere on mine. Still a good buy.