Great shirt, especially for the price -- order 1 size larger
I am delighted to have found this shirt on Amazon. I just ordered a couple of other colors (have the aqua color, just ordered white and pale pink). The price is unbeatable. I wear it as lounge wear, to take walks on a chilly day, and even to sleep in if I'm chilly.
It's fairly light weight, which I like. So it's buildable. If you want a slight loose fit (still fitted, but not tight), order up a size. The sizing is consistent with the size chart on the site. It is fitted by not tight. If you want it a bit tight, order your regular size.
I've had the first shirt for a while now - long enough its been through a few washes and it's held its color, shape, etc. I hang dry (not sure what the tag says to do, but give the light spandex, I don't like to put in dryer). The only minor issue I have had is some loose strings around the wrist area (hopefully not a sign of things to come). I just trimmed it and seems to be good as new.
I can't speak to sun protection, but I like the concept and hope it works.