This hat has blue stripes, which implies that this pilotka was used by the Soviet Air Force military personnel. Material is made of 50% wool and 50 % cotton, with cotton lining inside. Unissued military stock. Manufactured at least 20 years ago in USSR. For the first time pilotka became a part of military uniform during WW1 among German pilots. Later on in 1930s it became the main head wear piece for the 3rd Reich. In Russia pilotka was first implemented in the doors of WW2 when budenovka hat was substituted by pilotka. Usually pilotka is made out of cotton and is colored in the camouflage green with the stripes and insignia that distinguish to which particular military branch the piece belongs. Free shipping in U.S.!