When it comes to sun protection, one of the most common misconceptions is that you don’t need to wear sunscreen indoors. Unfortunately, that’s not true — not even a little bit. And well, considering we’re all about to be stuck inside for the unforeseeable future to prevent the continued spread of COVID-19, it’s time to set the record straight on this matter once and for all.

“It’s a common misconception that you don’t need to wear sunscreen when you’re indoors,” Joyce Park, a California-based, board-certified dermatologist, tells Allure. “Standard glass windows block UVB but not UVA rays, which can penetrate deeper into the skin than UVB [rays], are the main contributing factor to photoaging — which are changes seen as dark spots, wrinkles, and leathery textured skin.”