Purchased for a longer bike ride in summer weather this shirt has proven itself in all its positive characteristics: It is long enough in the kidneys, it has no disturbing and abrasive labels, the ventilation is just as good as the windshield, because right through the two different types of fabric ventilation channels in the right places (armpits, back) are created. Fit and seat are normal, not too tight, but to the body (in my case, a L). This is important because otherwise the shirt is not working. The only small negative points are the somewhat narrow neck collar but not disturbing due to the elastic material and the relatively high weight of the shirt (compared to a normal synthetic undershirt). For a competition in Laufbereicht would possibly take another shirt.
For this you get a shirt, in which the body climate remains pleasant, the sweat is not in the clothes and also the windshield is good, so never shivering. I have the shirt for a week virtually not taken off (no problem by rinsing, and dried over night) and at temperatures above 20 degrees on the wheel as a single layer around the top, otherwise worn under a long-sleeved shirt. The next applications are skiing (bottom layer) and running. A hugely practical piece of clothing for sports outdoors, not indoors.