Love this 50s beach shot from Vogue, July 1954.

Sun umbrellas can block up to 77 percent of UV rays offering much needed protection in the sun with most umbrellas being as effective as sunscreen! Of course, we need both to be sure to get proper coverage, but with a combo of sunscreen and a sun umbrella or parasol, those wrinkles will go settle on the next sun worshipper. 

See this article from Prevention magazine.