6 Reasons SPF Is Essential Year Round, According to Skin Care Experts

Any time you're even remotely close to a window — be it in your car, on the train or in the office — you're being exposed to the sun's UV rays. This ambient sun exposure isn't as potent as being directly in the sunlight since it's partially filtered by glass, but it can still cause damage. As such, you should wear sunscreen to protect yourself even if you have no plans of venturing outside to even check your mail or walk the dog.

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