The flight jacket, or bomber jacket is a garment originally created for pilots, which eventually became part of popular culture and apparel. In the First World War most airplanes did not have an enclosed cockpit, which necessitated a garment that could keep pilots sufficiently warm.
A sheep's skin with the wool on, esp. when made into a garment or rug
Leather from a sheep's skin used in bookbinding
parchment: skin of a sheep or goat prepared for writing on
diploma: a document certifying the successful completion of a course of study
A diploma
tanned skin of a sheep with the fleece left on; used for clothing
Navy Patrol Bomber Air Gunner Clothing at the U.S. Navy Museum
The U.S. Navy Museum caption reads:
Air Gunner, Navy Patrol Bomber 1941-1945
Because of extreme cold at upper altitude, aircrews wore warm, durable clothing. Both the M-445A heavy winter jacket and the matching M-446A trousers were lined with shearling, sheepskin tanned with the wool left on. The leather NAF-1092 flight helmet is fitted with A-N 6530 goggles. A Mark 1 life jacket or Mae West is worn over the jacket. While in the aircraft, crews wore a parachute harness on top of the other equipment. Gunners had special mittens with trigger fingers. The heavy shearling-lined boots with rubber soles feature two zippers, one for normal use and one with a leather, pull tab for use in an emergency. The .50 caliber Browning machine gun features an aircraft type grip; next to it stands a 250-round ammunition box. The Polaroid, variable density, gunner's goggles can be adjusted by the knob on front.
Courtesy, Naval Historical Foundation
This uniform can be seen in "the Atlantic Theater" section of the In Harm's Way, the Navy in World War II exhibit at the National Museum of the United States Navy at the Washington Navy Yard in Washington, D.C.