Swimsuit, sunscreen, a Coastal Grandmother-approved Lululemon bucket hat—you’ve got the essentials covered, but you can’t quite shake the feeling like you’re forgetting something. We hear you, which is why we’ve polled everyone we know to uncover the unexpected must-haves for a day by the water. Because you deserve an afternoon that’s sunburn and sand-in-your-bikini-bottoms free, dammit.