To be outdoors and not to worry about the UV rays these days are hard to ignore. I found a perfect solution from Eddie Bauer. They are shirts with UPF +50 protection built in. They keep you cool since it does not absorb rays from sun, and if you get wet, it dries really fast. I wore pair of pants made with same fabric to visit the niagara falls, it proved to be the perfect thing to wear. It kept me cool in the sun, and after getting drentched by the mighty niagara, it dried right away.