I wanted to post a photo because some time ago someone asked if it was transparent and everyone answered with a weird binary no, even white colors ( like mine). If you're sweating and it's sticky, it's a little more revealing than ideal, but not very noticeable at first glance. In hot weather, it should be cool, and it is. The pores in this shirt are very small/tight (even when you stretch it) so the sun doesn't shine through, which worries me. The sleeve/body length is perfect but is quite loose which is good for breathability. There is no spandex so it doesn't really stretch to have a comfortable fit like a tight compression shirt. I can't say this is my favorite shirt design wise, but it's probably 80% as good as my old favorite shirt that costs AT LEAST 300% of what it's advertised for. I still have a few kilometers to go before I can say much about the performance.