This hat gives better protection from the sun than any hat I have tried and I have tried many! The super wide brim with its wide side and back flap, stop the sun from all angles. The side air vents bring in lots of cooling air - a must for Florida living. My son wears this hat while fishing on land and offshore. The chin strap is a must. It is a little big for my smaller head but this is still my hat of choice when riding my bicycle and when doing yard work in the Florida sun. Keeps me cool and protects me from the damaging rays of the sun. Love it. I place a rolled up paper towel at my forehead to create a snug fit and to act as a disposable sweat band. When I want to look pretty or when there is less sun, I switch to an expensive but smaller fitting, Sunday Afternoons brand Adventure Hat.