I'm a woman and wore these as swim shirts with my swim capris and no one even knew these were men's shirts.  I wear a women's size M and ordered the men's Small. The cut, style and fit are certainly like a typical unisex T-Shirt, but this fabric is magical.  Lightweight, easy to wear, dries fast, AND SPF 50.  I spent hours in the Costa Rican sun wearing these shirts swimming and wandering around and can attest to the sun protection these provide.  I did not wear sunscreen and had NO COLOR AT ALL.

I bought these same shirts in blue for my husband and also the long-sleeve versions in two different colors for both of us.  During the trip, I wasn't sure what to wear given that I had to worry about the 95 degree heat and the blazing sun.  I picked up the long sleeve version and had decided it would be too hot, my husband said, "No, it'll be OK."  And since he was wearing his and had been most of the trip, I went for it.  So glad I did.