HOT WEATHER UNIFORM The Propper Tactical OCP Ball Cap is made of the same 5.9-6.4 oz. 57% nylon / 43% cotton ripstop in OCP camouflage pattern that the US Army uses in their IHWCU Hot Weather ACU uniforms. NYCO BENEFITS This modern 57% nylon 43% cotton ripstop fabric is that it dries more breathable and faster than military NYCO fabrics of the past. Keep your head cool and comfortable in the hottest conditions. TAN 499 TRIMS: the inner lining and sweatband, Velcro fasteners and inner stiffener are all Tan499 authentic military grade color and quality. Identify yourself: Tan499 loop panel on the back of the hat above the adjustment strap is approx. 5 inches wide for name ribbon placement. ONE SIZE FITS MOST - Adjustable Velcro at the back is adjustable for the perfect fit over all adult hat sizes.