Peyton List's Must Haves: From Saje's Peppermint Halo Oil to a Chanel Crossbody Bag

List prioritizes comfort, and the Calvin Klein Modern Cotton Unlined Bralette ($17, originally $30) is her everyday go-to. "I just like something simple that is comfy and does not have any padding," List explains. She prefers classic colors like black and gray. "I'll wear it underneath anything and everything," she says. "I even like wearing it when I'm working, because at least I'm comfortable underneath whatever it is that my costume is." When she's not on set, she usually opts for a casual look, like a T-shirt, Levi's, and sneakers.

Pro Tip: If you're looking for something that provides more coverage or a relaxed fit, it's best to size up.