12/9/2023 0 Comments Sport face sunscreen![]() “One test is conducted for sun protection factor (SPF), and one for broad-spectrum abilities. Rogers says that brands endure two types of testing when it comes to sun defense. UVBs, with their shorter wavelengths, are what cause sunburn and skin cancer. They penetrate the skin more deeply than UVB rays. UVA rays have longer waves and cause “aging” effects on the skin (loss of moisture, rough texture, wrinkling, hyperpigmentation). You also want a broad-spectrum sunscreen, which means it properly shields you from both types of UV rays - UVA and UVB. (We’ll explain the difference between UVA and UVB rays in the next bullet point.) SPF 50 will shield 98% of UVB rays, and SPF 100 will reject 99% of them. If you increase from 30, you incrementally improve your defensiveness. This will provide 97% defense against incoming UVB rays, whereas SPF 15 provides 93% defense. The FDA (and virtually all dermatologists) recommend SPF 30 as the absolute minimum defense against UV rays. ![]() ![]() Make 80 minutes your benchmark since it’s the highest resistance advertised. Yes, the first tip is a given, but there are other qualities to look out for, too.Īs mentioned before, you want a sports sunscreen to be as resistant as possible against water and sweat. Here are the keys to a good sports sunscreen. Only after this process is the SPF of the sunscreen product measured, so, when you buy a sweat- and water-resistant sunscreen, its SPF is likely stronger than advertised upon application, but it can only advertise itself based on its SPF value after the 40- or 80-minute water immersion, whichever of those two it uses to label itself. To obtain a ‘water-resistant (80 minutes)’ claim, the immersion and drying cycles must be repeated for a total of four immersion-drying sequences.” This sequence must be performed to substantiate a ‘water-resistant (40 minutes)’ claim. Then the sunscreen on the subjects is tested according to the FDA SPF Test method. After sunscreen application, subjects are immersed in water to cover the test area for 20 minutes, followed by a 15-minute drying period. “The water-resistance component of the test consists of alternating water immersion and drying procedures. Here is a pared-down summary of the FDA’s official water-resistance testing for sunscreens: How Water and Sweat Resistance Is Tested In Sunscreen
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