I received this shirt as a gift and I absolutely LOVE it ! I didn't want to take it off... It kept me warm on a cool day and the material is so soft on the skin. There is nothing that can compare to pure merino wool for cold and hot days to keep your body temperature right where you want it. I'm 5'4" at 145 lbs and I got a Medium and it fits great, the shirt falls at my hips and the sleeves go to mid palm. I would tell anyone who wants a great product to buy icebreakers !!