This model is designed for use at altitudes up to 20 kilometers, where the presence of an oxygen mask is simply necessary. The helmet was made in the USSR and is still used in military aviation, despite the appearance of more modern models. This is the original protective flight equipment made in the USSR.
This item is in the category "Collectibles\Militaria\Surplus\Hats & Helmets". The seller is "dobrun-77" and is located in this country: UA.