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Fashion month—that four-city sprint through New York, London, Milan, and Paris—is a marathon, and for nobody more so than the models who spend from dawn until dusk hightailing it from castings to fittings to runway shows. The constant to and fro demands that their loads stay light—so just what exactly is worthy of a spot in their Céline totes and Dior saddle bags?
Backstage in New York this week, a quick peek confirmed that a single all-star beauty product is as much of an essential as a portable phone charger or a Citi Bike pass. Perhaps it’s a French redness-reducing treatment, perfect for calming the effects of hours spent in the makeup chair, or a tinted CC cream that hides any signs of early-call-time fatigue. Above, Lily Aldridge, Grace Elizabeth, and more of the season’s favorite faces sound off on the one beauty product that makes the Fashion Week cut.