Mesh Boonie Hat is made of a lightweight polyester. Mesh ventilation about 3/4 of the boonie hat. Lightweight material and vent mesh has been designed to keep you cool. Protects your head from the sun. Inspired by the classic military boonie the hat. Includes Branch loops, 3" brim, adjustable chin strap and sweatband. Fully adjustable with an elastic cord and button lock, one size will fit most. Color: Khaki