Great all around sun protection.
Just spent a week in Hanalei Bay, and coming from Utah I am pasty white. I got this shirt as my rash gaurd, which I like better than the normal skin tight rash gaurds. I wore this pretty much any time I was out in the sun or in the water. As a rash gaurd it's great, the only complaint being that it comes up over your head when you wipe out. It's got a loop to tie it to your boardshorts, but I didn't hook that up. For everything else where you want sun protection it's great and super comfy. I'm 6 ft tall, 160lbs and the med fits just right.