These boots are original dating from the 2nd World War. They were designed not just for flying but for escape and evasion .Black Suede uppers , leather shoe with laces which are not original ones, brass zippers metal buckle & leather strap in good condition . Sheep’s wool inside for warmth , sole original from heel to toe is 11”outside, great for Museum or Collector of War Memorabilia . My Dad used to wear these in the winter to keep his feet and legs warm he was a size 8