Built-in UPF 50+ provides the protection, while the polyester fabric provides the strength and that's the winning combo that makes the Omni Session Surf T-shirt every surfer's favorite.
I will have to return this shirt! I purchased this for my son for his birthday and after wearing once the seams on the side unraveled!
I usually have great success with the quality of clothing and this was not one of them! What a disappointment!