Caught on Film She may look good, but she’s facing a full UV assault. Our UV camera detects what the human eye can’t: Areas of skin that are protected by sunscreen appear dark; lighter areas are uncovered and vulnerable to UV rays, wrinkles, and potential skin cancer. Here, it’s hard to see any dark spots at all—because she didn’t reapply.Damage Alert: The SPF applied 4 hours ago has worn off. 11 AM: Brunch Outside Freshly applied SPF + a hat and shades = maximum protection. The secret to her face’s bulletproof protection? Layers. Bolster a facial sunscreen such as Stri-Vectin Repair & Protect Moisturizer Broad Spectrum SPF 30 ($89, strivectin.com) with SPF-spiked makeup on lids and lips. Try Bare Minerals 5-in-1 BB Advanced Performance Cream Eyeshadow Broad Spectrum SPF 15 ($18, bareescentuals.com) and Neutrogena Revitalizing Lip Balm SPF 20 ($9, neutrogena.com). SPF-containing lip balm is a smart move: Like your nose and forehead, the bulk of your lower lip is exposed to the sun, making it a high-risk spot for UV damage.Damage Alert: She skipped sunscreen on her arms.Extra Protection: All the sunscreen in the world can’t match the shade a hat adds. Just make sure your brim measures 4 inches all the way around. MORE: 3 Sunscreen Spots Everyone Skips 12 PM: Out for a Drive SPF-free arms get the brunt of the sun’s radiation when you’re at the wheel. Your car offers no sun-safe haven. Windshields block UVB, but UVA rays, which penetrate deeper into skin and create more cancer-causing damage, can get through the glass, says Joshua Zeichner, MD, director of Cosmetic and Clinical Research in Dermatology at Mount Sinai Hospital in New York City. Store SPF that’s easy to apply, like La Fresh SPF 30 Sunscreen Wipes ($40 for 48, lafreshgroup.com), in the car or, yes, install one of those dorky UV-blocking window films.Damage Alert: The sunscreen she applied 2 hours ago is fading fast. MORE: What Having Skin Cancer Is Really Like 2 PM: During a Swim See all that SPF rinsing off? That’s not good. If you thought you could dive in immediately after slathering up, this photo will make you think again. Always apply a water-resistant SPF like Aveeno Natural Protection Lotion Sunscreen with SPF 50 ($10, aveeno.com) 15 minutes before swimming.Damage Alert: She hopped in immediately after applying, and most of the SPF rinsed off. MORE: 3 Ways To Get Better Skin—When The Sun Damage Is Already Done 4 PM: End-of-Day Jog Her face is fully protected, thanks to a reapplication. Getting your sweat on? Dab yourself dry and reapply sunscreen every 2 hours, says Michael Shapiro, medical director of Vanguard Dermatology in New York City. Perspiration washes sunscreen away fast.Extra Protection: Super sun sensitive? Know exactly what kind of exposure you’re getting at all times with new UV trackers you wear on your wrist, like the UVA+B SunFriend Daily Sun/UV Monitor ($50, sunfriend.com).Damage Alert: Her body is still exposed. The sun’s about to go down, but damage doesn’t stop here. (Never fear, we’ve got 12 Natural Sunburn Cures ready to go, just in case.) The wrinkle-inducing effects of UV rays continue for a full 3 hours after exposure, meaning this smooth skin could soon be a thing of the past.