Ordered 8 pieces to walk the dog in the summer. 4 were badly sewn and fell apart. 2 were substitutes for bad shirts that were bad in themselves. They're a bit breathable, but also see-through, which is why I'm concerned about the UPF rating. Also, there is nothing on the packaging to indicate that they are UPF rated and as I am undergoing melanoma chemo which puts me at additional risk of developing new skin cancer this is not bothersome. They are big and don't shrink.