These Are The Sunscreens Dermatologists Actually Use On Themselves By Chelsea Burns, Celia Shatzman, Mara Santilli of Women's Health | Now that you're spending as much time as humanly possible outside, whether that's a workout, beach picnic, or a mid-day walk to clear your head, you can't forget about lathering on the SPF. (PSA: you need sunscreen all times of the year, even on cloudy days, according to the American Academy of Dermatology Association). When it comes to selecting that go-to sunscreen to kick off the season, you probably know the basics, such as the fact that you should opt for a sunscreen with at least SPF 30. But after that, things might get murky with all of the endless options. There are a few key factors that can help you narrow down choosing the best sunscreens.