1. Buy garments that suit your purpose. You don’t need a heavy work shirt for the beach, but a longsleeved, tightly woven linen shirt can be both cool and sun-smart.
2. If you are buying elastic garments like leggings, make sure you purchase the right size — overstretching will lower the UPF rating.
3. Look for garments with a UPF of at least 30 so that you know you’re getting effective sun protection.
4. Choose garments that cover more skin—there’s no point in a high-UPF bikini.
5. Wash new garments made from cotton or cotton blends two or three times at least. This can often permanently raise the UPF rating due to shrinkage of the spaces between the fibers.
6. Select wide-brimmed hats (at least 3” in diameter) that shade your face, neck and ears.
7. When outdoors, seek out shaded areas under trees and minimize your time in the direct sun.
8. Use UV-filtering sunglasses and sunscreen with a sun protection factor (SPF) of at least 15 for everyday incidental exposure and 30 or higher for extended exposure. Apply sunscreen on all exposed areas — clothing can’t cover everything.5
Remember, sun-protective clothing doesn’t have to be boring: it can be light and bright and fashionable and fun. And when chosen and used correctly, it’s the best form of sun protection you can find.
Source : Skincancer Organization