A women wearing a mask to protect from extreme smog visits the Tiananmen Gate in Beijing December 8, 2015 as China's capital issues its first ever "red alert" for pollution. (Photo by Damir Sagolj/Reuters)

A model models shoes at the Chloe Gosselin Presentation during Fall 2016 New York Fashion Week at Lori Bookstein Fine Art on February 14, 2016 in New York City. (Photo by Ilya S. Savenok/Getty Images)

Models wait backstage during Ukrainian Fashion Week in Kiev, March 17, 2016. (Photo by Gleb Garanich/Reuters)

A model is reflected in a mirror as she applies make up backstage during Kazakhstan Fashion Week in Almaty, Kazakhstan, April 19, 2016. (Photo by Shamil Zhumatov/Reuters)

Brooke Candy attends the VFILES show during New York Fashion Week at Barclays Center of Brooklyn on September 6, 2017 in New York City. (Photo by Roy Rochlin/Getty Images)

A model presents a creation by Irene Luft during the Berlin Fashion Week Autumn/Winter 2019/20 in Berlin, Germany, January 15, 2019. (Photo by Fabrizio Bensch/Reuters)

Models present creations displayed as part of the “Lingerie Rocks” fashion show, running on the sidelines of Paris Fashion Week, in Paris, France, 20 January 2019. The “Lingerie Rocks” show displays work from 14 lingerie brands, including Antigel, Antinea, Aubade, Chantelle, Empreinte, Eprise, Epure, Implicite, Lise Charmel, Lou, Louisa Bracq, Maison Lejaby, Passionata et Simone Perele. (Photo by Ian Langsdon/EPA/EFE)

(L-R) Gigi Hadid and Bella Hadid pose backstage prior to the Victoria's Secret Fashion Show on November 30, 2016 in Paris, France. (Photo by Pascal Le Segretain/Getty Images for Victoria's Secret)