Roll-top dry bags are the move.

Yes, get a roll-top dry bag. That’s the only style worth buying for the beach.

The roll-top seal is simple, reliable, and rarely fails. Zippers are a gamble with sand and salt — they jam, corrode, or leak. A pouch with a snap-close? Might keep out a splash but not a wave. Roll-top bags are cheap, durable, and so easy to use that even a distracted beach-going parent can close them right.

You don’t need an expensive brand. Sea to Summit and NRS are the gold standard if you kayak or snorkel. But a $15 Earth Pak from Amazon holds up fine for a summer. Just get the right size — 20 to 30 liters for a family trip, 5 to 10 for just your phone and keys.

Your phone will thank you.