Cool Tool Alert: Sunbathing Calculator

Cool Tool Alert: Sunbathing Calculator
Be honest: Do you understand how your sunblock works? Or rather, do you understand the meaning of that telltale number on the bottle? Is SPF 15 really any better than SPF 50, and how can you tell the difference? Well, to answer your questions, sunblock works like this: Say you're pretty fair, and when you go outside, your skin starts to burn within...
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822 Hits