UPF 50+ Wesley Swim Trunks: Our popular swim trunks feature a built-in mesh liner, waist drawcord, and custom Flap Happy prints which your lil' man will love! Not only are they fun and stylish, but they are also UPF 50+, the highest rating in the UPF classification system. Mix n match with coordinating Flap Happy UPF 50+ rash guards and UPF 50+ hats for maximum sun protection. Great for the pool, the beach, or any outdoor play!