SPF—three little letters that hold the key to sun protection. But what do those numbers really mean? Contrary to popular belief, SPF isn’t a linear scale of defense.

Let’s break it down: SPF 30 blocks about 96% of UVB rays and SPF 50 pushes slightly higher to 98%. While higher numbers offer marginally increased protection, the real magic lies in consistency and application technique.

Remember, SPF primarily shields against UVB rays, which are responsible for sunburns. It doesn’t necessarily extend your time in the sun. That’s why reapplication every 2 hours (or more frequently if you’re swimming or sweating) is crucial for maintaining effective coverage throughout the day.

Pair your SPF diligence with other sun-safe practices—think sunglasses, wide-brimmed hats, and seeking shade during peak hours. Your skin will thank you for the extra love and care, staying youthful and radiant for years to come.