Despite what many people believe, they need to protect their skin even while driving a car or flying in an airplane. The truth is that we are constantly being exposed to UV rays and it's these daily exposures which progressively break down the collagen fibers on our faces over time. What kind of sunscreen should you be using? It needs to have SPF 30+, with broad-spectrum protection for UVA and UVB rays as well as dryness prevention (since this can contribute further aging). Apply every 2 hours!