ExOfficio Bugsaway Adventure Hat 100% Nylon Imported Brim width: 3 1/4" front/sides and 4" back Removable, adjustable clip-on chin strap Insect shield technology repels mosquitoes, ticks, ants, flies, chiggers and midges Flexible brim with anti-glare under brim Mesh-lined headband & crown Brim width: 3 1/4-inch front/sides and 4-inch back