The Doctor's fur coat was a fur coat used and worn by the Second Doctor in cold weather.
The coat was made of polyester rather than animal skin and was bought by einter the First or Second Doctor on the planet Thraxis. (AUDIO: No Place Like Home)
The Doctor was first known to wear it during his second incarnation, when visiting the Himalayas. He wore the coat to protect him from the cold, but the coat lead him to being mistaken for the Robot Yeti who had been killing individuals. (TV: The Abominable Snowmen)