What to Put in a Dry Bag for Travel

A waterproof dry bag is one of the most under-appreciated travel items. The combination of beach trips, boat days, kayaking and rafting, sudden tropical rain, and flooded city streets means there's a real demand for waterproof storage in many trips. The dry bag — a roll-top bag designed to be sealed against water — handles all of these scenarios reliably. Here's what goes in it for different trip types and why it matters.

What a real dry bag does that a plastic bag doesn't. A real dry bag has: tested waterproof seals (the brand-rated bags are tested at IPX7 or higher), reinforced material that doesn't tear or develop pin-holes, a roll-top closure that's actually waterproof when properly rolled (3 times minimum, then clipped), and durability that lasts years rather than a single trip. A sealed Ziploc bag works for one-time emergency situations; a real dry bag is the trip-long solution. Brands worth knowing: Sea to Summit, Granite Gear, Osprey, NRS.

What size dry bag for travel. 10–20 liters is the right size for most travel scenarios. A 5-liter dry bag is too small to be useful (only fits phone and keys); a 30-liter is overkill for most travel scenarios. The 10–20L size carries a phone, camera, important documents, change of clothes, and small valuables — enough for most boat or beach scenarios.

What to put in a dry bag for boat or kayak trips. Phone and charger. Camera or GoPro. Spare batteries. Keys. Wallet (passport stays at the hotel for international trips, but travel ID or driver's license goes in the bag). One change of dry clothes (you'll appreciate it after a wet swim). Sunscreen and any medications. The dry bag itself can serve as a swim float in emergencies (real ones are inflatable).

What to put in a dry bag for tropical rain travel. The same items above plus an umbrella, change of socks, and a real rain jacket if there's room. Tropical monsoon storms can saturate everything within minutes; a dry bag inside your daypack means electronics and documents stay completely dry regardless. The dry bag is the actual waterproof technology, not the daypack itself.

What to put in a dry bag for snorkeling and beach. A real dry bag becomes a beach valuables station. While you're in the water, the bag stays on shore (or with a beach attendant if available); your phone, camera, wallet, keys, and sunscreen stay dry and protected. For boat-based snorkeling, the bag goes onboard with you and is rolled and clipped during the swim sessions.

What to put in a dry bag for white-water rafting and serious water sports. Different from leisure travel — waterproof drybag with airtight seals (Ortlieb, NRS), inflatable for buoyancy, attached to the boat with a clip. These are dedicated white-water bags and meaningfully different from leisure dry bags. For commercial rafting trips, the operator usually provides this; for self-supported trips, invest in real white-water-rated equipment.

What not to put in a dry bag. Anything you'd be willing to lose if the bag failed (rare but possible). Items that can be replaced easily — keep the things-that-matter rule in mind. Heavy items that strain the closure system (most consumer dry bags are designed for items under 5–10 lbs).

How to use a dry bag correctly. Roll the top three times minimum, then clip. Don't compress before rolling — push the air out as you roll. Test the seal before any water exposure (fill with water, seal, invert — should not leak). Inspect for damage after each use; a small puncture compromises the entire seal.