Great shirt! Super comfortable, great sun protection for kayaking. It looks fantastic.
Seamless so hopefully no armpit chafing. Feels soft and comfortable, and high quality material and construction. I really don't want to take it off I like it so much.
I was on the lower end of Medium based on the size chart. I am 6'0", long arms and slim build. The shirt is a bit loose.
I was thinking of sending it back for a small to get a bit more of a 'compression' look, but didn't want to get into the situation of returning it and then thinking the medium was a better fit after all. As my arms are long and I will be paddling, I didn't want to run into sleeve tightness when my arms extend, plus I like the neck to be relaxed and not too tight.