–After 80 minutes of sweating or swimming Apply liberally and evenly 15 minutes before sun exposure. “Also, avoid applying powder sunscreens in windy areas to ensure all of the product actually makes it onto your face.Directions: Please shake well. “I recommend pouring about a teaspoon of powder sunscreen on the back of your hand and then applying it to your face,” Svidzinski said. However, when used for touching up, powders can provide supplementary SPF (especially in the hot summer months), as long as you apply enough. Powder sunscreens are not effective for initial sunscreen application because they’re “not easy to get enough applied to the skin, or get an even application, to make them an effective method of UV protection,” according to Cula Svidzinski, a dermatologist at Mount Sinai. SPF powders, while not suitable as primary sunscreens, can be useful for reapplication-if used liberally. Proper reapplication for full SPF protection throughout the day can be tricky: Having to stop what you’re doing every two hours to smear on a fresh layer of lotion sunscreen is already daunting enough-and it’s even trickier if you’re wearing makeup. Powder sunscreens are mineral-based sunscreens that resemble setting powders. (We recommend using our main sunscreen pick if you’re going to be outside playing sports or swimming.) Yet water resistance can be helpful if you do wind up sweating or getting caught in the rain.
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