I'm by no means as fit as the mannequin this shirt sits on, but I'm not massive (5ft 8in", 165 lbs ) and still The small size was a bit loose for me. That's probably ok for most as I usually wear my clothes (especially stuff like that) smaller. It's quite comfortable and nice to walk in. It's still not warm enough to see how good it is it absorbs moisture, but I suspect it will work admirably.
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