Sydney Leroux's Must Haves, From a Luxe Mattress to a Celeb-Favorite Throw Blanket

Leroux's go-to travel item is the Nike Utility Power 2.0 Duffel Bag ($65), where she stores an extra change of clothes, her skin care, all her technology, and more. The duffel has a big compartment in the middle and numerous on the sides to fit everything she needs. "You need to have everything in a personal bag in case something goes wrong," she says. "If they lose your luggage, you need to be able to survive."

She also points out that many bags marketed as approved personal items don't always fit underneath the plane seat, so she appreciates how the Nike duffel fits "so perfectly."