Helmet features positive pressure visor seal. This is one of the last helmets in my stock. It is a completed set, never used, and very rare. You will surely regret if miss it. DC-3 size 2# for 176cm or so.The item "Air force mig fighter aviator militaria aviation pilot flight helmet, fly suit" is in sale since Thursday, April 22, 2021. This item is in the category "Collectibles\Militaria\Militaria (Date Unknown)\Air Force". The seller is "felicia567" and is located in China,shanghai. This item can be shipped worldwide.