Lumberjacks wore plaid. Punks wore plaid mini skirts. The Beach Boys used to be called the Pendletones, and they wore plaid with their surfboards. Lots of different groups have adopted the pattern over the course of the 20th century, but if we want to explore how this pattern proliferated, we’ve got to go to Scotland. Articles of Interest is a show about what we wear, created by Avery Trufelman; a six-part series from 99% Invisible, looking at clothing.