Ultra Force 3 Color Desert Camo Boonie - Poly Cotton Ripstop, ImportedUltimate Value. Made to goverment specifications. Made from polyester/cotton ripstop material. The Boonie Hat, first used in the jungles of Vietnam, has: a 360 degree 2 1/2" wide sun brim; stitched loops directly above the brim for adding camouflage; a drawstring chin strap; and four air vents for heat and moisture release.