Moleskin
From Tardis Wiki, the free Doctor Who reference
Moleskin was a cotton fabric used to forge many clothes, called after the fur of a mole due to its softness.
The Eleventh Doctor wore double breasted overcoats of moleskin in olive green (TV: Let's Kill Hitler) or raven black. (TV: A Town Called Mercy)
The Eighth Doctor wore a bottle green moleskin overcoat up to his death. (COMIC: The Pictures of Josephine Day, TV: The Night of the Doctor)
The War Doctor wore double breasted moleskin waistcoats in ginger, (COMIC: The Clockwise War) navy blue, (COMIC: Ambush), mustard yellow, (COMIC: Fast Asleep) and dark brown-green. (TV: The Day of the Doctor)