I love the merino weight of the shirt. The sleeves fit great, I did not size down. One big issue. The crew neckline does not stretch! So every time it goes over my head, I tear some stitches out. My icebreakers have a stretchy crew neck and my stoics have stretchy hems and sleeves, so am clueless as to why this does not have a stretchy neck! I won't send it back cause I still wear it, but I've ordered another zip neck to replace this because this is really annoying and over time I don't know how long it will hold up.