Don’t trust labels. Tougher FDA labeling requirements won’t go into effect until the end of the year, so sunscreen sold this summer can still carry such misleading claims as “all-day protection” or “sweatproof.” Note that any sunscreen with an SPF of less than 15 is ineffective in lowering the risk of cancer or skin damage.
Don’t skimp. “To get the level of SPF promised on the label, you need to slick on enough for your skin to stay damp for a minute or two.” Think a palmful if you’re wearing a bathing suit. With sprays, apply generously, rub in, “then mist yourself once more to ensure consistent coverage.”
Beware of pale fabrics. Whenever you wear light gauzy fabrics, wear sunscreen underneath. Note that white clothes offer the least protection from the sun because they lack UV-absorbing pigments.
Source: Better Homes and Gardens