Rihanna-approved facialist Sean Garrette tells us how he went from cosmetology school in Atlanta to his current position as Dior Beauty’s U.S. skincare expert in just a few years. Plus, we talk about skin barrier repair, facial percussion, his favorite at-home skincare devices, the best treatment for keratosis pilaris, why he puts retinol on his hands, and the three things you need for a “moisture sandwich” that will make your skin plumper and more hydrated.