Cover-ups are the multifunctional must-have of summer. They're great over your swimsuit at the beach or lake, relaxing by the pool, or simply as lightweight summer loungewear. If you're heading to a resort or an a cruise, remember that many require cover ups in the lobby or where food is served. Get one that doubles as a dress for extra travel options. Also see the plus cover-ups on Amazon.com. **Page contains affiliate links. More info.