Moleskin
From Tardis Wiki, the free Doctor Who reference
Several incarnations of the Doctor wore clothing which appeared to be made of moleskin.
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) and dark brown-green. (TV: The Day of the Doctor)