The Gardener Lattice natural palm straw hat is a tightly-woven sun hat with a pattern of holes woven into the crown to allow for air flow. A slightly elastic stretchable sweatband inside the crown makes for a snug and comfortable fit all day. Brim is approximately 4" on all sides with a 4.5" crown height. Also has a nylon chinstrap cord with adjustable tensioner. UPF 50+ sun protection.