U.S. Military Original OD Green OG507 Hot Weather Cap Size 7 1/8 Dated 1987U. S. Military Original OD Green OG507 Hot Weather Cap Size 7 1 8 Dated 1987 These hot weather caps were first issued in the early 1960s to troops station in hot weather areas. Sateen style OD green fabric outer base, and leather sweatband. To be originally warn with OG507 uniform, these are the exact same as the ones issued out in Vietnam! And in a livable size! Will look great with OG107 or Slant pocket uniforms! We were fortunate enough to find the