If you've been invited to a beach wedding, you're in for a treat. A cool sea breeze, romantic sunset, and ceremony on the sand—it's the perfect excuse to take a tropical vacation. But despite the picturesque setting, it can be difficult for wedding guests to know just what to wear to a destination wedding like this. Beach weddings present a number of obstacles when it comes to appropriate attire—you need shoes that can be worn on sand, and a dress that's lightweight enough to keep you cool and easy to pack without wrinkling or taking up too much real estate in your suitcase.