The $8 Item Law Roach Uses to Prep Stars for the Met Gala — Plus 5 Other Must Haves

"People always ask me what my favorite thing to wear is and they expect me to say something extravagant, but my favorite off-duty look is actually just a pair of Hanes sweatpants," Roach reveals. Hanes EcoSmart Fleece Sweatpants ($11, originally $21) are available in black, charcoal heather, light steel, navy, and slate heather, making for a range of neutrals that could easily round out anyone's casual athleisure wardrobe. Made from 50 percent cotton and 50 percent polyester, these sweats can be thrown in the machine often for an easy wash — especially since they're pill-resistant and durable.