Perfect for the hot, humid days.
I bought four of these for my 9yr old for school camp in Ozzie heat and they kept him both cool and sun safe.
These shirts should not be worn as a cover for Sunscreen. It's both common sense and sun smart to use sunscreen all over your body before putting the shirt on.
He did both and had zero issues at all.
I would definitely recommend these, and could easily have gone up a size from M to L if he wanted to tuck the shirts in.