For an icon of the fashion world, Michael Kors keeps it remarkably simple when it comes to his day-to-day work outfit. The designer opts to wear the same black crewneck every day of the week. His reasoning? Not having to choose different clothes each day saves decision-making energy, which can be channelled into his work. And he's not wrong to do this: there is a productivity logic when it comes to creating your own uniform, particularly if you’re working at home, and more formal clothes will help you get into your work mindset and be more productive, according to Charlotte Armitage, aka The Media Psychologist. Kors also isn’t alone in wearing the same clothes to work every day, as Segway inventor Dean Kamen, the late Chanel creative director Karl Lagerfeld, and film director and producer Christopher Nolan all had the same idea.