These are WWII US Army Air Forces Type B-1 leather flight pants. The leather has dried out a bit from age, and they are no longer supple but they remain pliable and in tact.
They are a size Medium. The item "WWII US Army Air Forces Type B-1 Leather Bomber Trousers Pilot Flight Pants WW2" is in sale since Saturday, September 11, 2021. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Field Gear, Equipment". The seller is "militarymuseum" and is located in Glendale, Arizona. This item can be shipped to United States, Canada, ...