Rothco Vietnam Veteran Boonie Hat 7 3/4 734. In addition to the embroidery the boonie hat features 4 screened side vents loops woven into the sides for leaves and branches for camouflage and an adjustable chin strap.' Specifications for Rothco Vietnam Veteran Boonie Hat: Manufacturer: Rothco Gender: Unisex Age Group: Adults Color: Olive Drab Fabric/Material: 55percent Cotton / 45percent Poly Polyester Features of Rothco Vietnam Veteran Boonie Hat Material: Polyester Material Specs: 55percent Cotton / 45percent Poly Package Contents: Rothco Vietnam Veteran Boonie Hat Rothco Vietnam Veteran Boonie Hat Olive Drab 7 3/4 5911-OliveDrab-734