“White Linen is great but not always your friend,” Polk says. “For example, white linen is great for over a bathing suit because is usually see through. If wearing white linen without a bathing suit — please be aware of your undergarments. White panty lines are not flattering! Stick with a nude thong and maybe a colorful bra that is meant to be seen.” Good advice, and something to keep in mind for all that sheer stuff in your suitcase.