Helmets were used, first of all, on the high-altitude supersonic fighters MiG-29 and MiG-31, but were also popular among the test pilots who worked with modifications of other Soviet aircraft. The Hermeticle GSh-6 is part of the high-altitude equipment of the pilot or cosmonaut, which is part of the VKK 6M high-altitude compensating suit and a high-altitude spacesuit. Hermetic helmet special design, giving the pilot (cosmonaut) the ability to fly at high altitudes when the cabin is depressurized and ensuring its survival under these conditions and with bailouts. Original. On all my lots a complete guarantee of originality. A good addition to your collection. I guarantee that the item will be qualitatively Packed and shipped within 3 business days. After sending the buyer gets the tracking number. Shipping from Ukraine to Europe (except Italy) is a minimum of 10 days to 30 days. Shipping in China min 14 to 45 days. Shipping to Italy, min 14 to 55 days.