I previously had this jersey in size medium, but tore the sleeve in a fall and got one in size small as a crash replacement. I'm 5'10, 160 and like how both jerseys fit. The small is very slim and a slightly compressive feel; the medium doesn't have any slack/bagginess but isn't quite as tight.
the title is not hyperbole (at least for where I live). I'm in Tucson, living the Sonoran Desert life, which means sun protection year round. This jersey delivers--in the summer it acts as an awesome evaporative cooler, while protecting my arms from the sun. In the fall and winter, it provides just the length needed and adding a base layer and vest extends its usability to all but the coldest days. The fit is perfect for me in a large--the first long sleeve jersey that fit my arm length. I'm 6'4" tall and range from 180-195 lbs. I now am the proud owner of 3 of these jerseys - coastal, gravel, and black (more to come, as it's my go to daily jersey)!
This jersey fits perfectly and breathes well.
The material is slippery, good, the fit is tight, but feels like the right size. I purchased a medium, 5’8 156 #, I usually wear sun sleeves but I wanted something different, I recommend this light feeling Jersey