“174cm, 59kg with a slim build and the medium fit exactly as expected. Slim enough to not flap around, but not racer tight. I have long arms for my height (180cm arm span) and the sleeves just reach my wrist bone. I've worn it on a couple rides between 5°-15°C, above 12° it's great on it's own, down to about 7° it was good with a gilet depending on wind, and below that it got a little chilly.”