Q: Is there really such a thing as a waterproof sunblock?*
A: "Nothing is waterproof," says Dr. Fusco. "The term is 'water-resistant.' Like all blocks, they must be reapplied frequently to be effective."
Hawaiian Green Tea Sunblock SPF 45 contains soothing aloe. $10; amazon.com
Aveeno Hydrosport Sunblock Spray SPF 50 goes on evenly and is formulated to work even when applied to wet skin. $11; drugstore.com
*According to proposed regulations from the FDA, sunscreen manufacturers can no longer claim that their products are "waterproof," "sweatproof," or act as "sunblocks. The new FDA guidelines will go into effect in 2012.