HUK | A1A BOONIE HAT NWT GRAY, Volcanic Ash The Huk Boonie Hat is designed to provide extra sun protection for those seriously hot days on the water and features an adjustable chin strap to secure the hat when you're underway or in windy conditions. H3000478-013 Product Details & Materials 100% Polyester Brim width: 3 ¼” Diameter: 6 ¾" Circumference of Interior: 60 cm LIGHTWEIGHT SMOKE FREE HOME DETACHABLE DRAWSTRING STRAP PACKABLE/foldable