There’s no denying it: Getting the fresh air from exercising outdoors is great! But along with it, you also get the harmful UV rays. To keep yourself shielded while still having fun in the sun, opt for a sweat-proof screen with SPF 30 or higher (look out for types that say “water-resistant” or “waterproof” on the bottle, terms regulated by the FDA), a lip balm with SPF 15 or higher, a lightweight hat, and sports shades. Also consider trading in your white tee and instead going for a shirt with built-in UV protection (a rating of 30 UVP is necessary to be awarded the Skin Cancer Foundation’s “Seal of Recommendation”; a white T-shirt has a rating of 10). And remember, the rays are at their brightest from 10 a.m. to 4 p.m., so try to plan a before-or post-work sweat-session.