Jumper

A jumper was an item of clothing, often worn over a shirt.

The Fifth Doctor wore a cricketing jumper under his cream coat. (TV: Castrovalva onwards) Similarly, the Seventh Doctor wore a sleeveless pullover, covered in turquoise zig zags and red question marks, (TV: Time and the Rani onwards) whilst the Twelfth Doctor wore a jumper patterned with holes. (TV: Listen et al)