Perfect swim shirt. When I go to the pool with my kids in the summer, I can't put sunscreen on my own back and shoulders. So, I take off my regular sun cover and put this on to go into the water. It's great. It's like a swim suit material. It's mean to fit a bit tighter, so a medium works for me as the sizing chart suggests. Also, the color of this blue is a bit deeper than pictured, leaning towards purple. I love it.