What's the noun for plaid? Here's the word you're looking for.
plaid
(textiles) A type of twilled woollen cloth, often with a tartan or chequered pattern. [from 16th c.]
A length of such material used as a piece of clothing, formerly worn in the Scottish Highlands and other parts of northern Britain and remaining as an item of ceremonial dress worn by members of Scottish pipe bands. [from 16th c.]
The typical chequered pattern of a plaid; tartan. [from 19th c.]