Waterproof Dry Bags and Duffels

On board, saltwater attacks any unprotected gear. A quality dry bag must prevent liquid ingress even in rough seas or heavy rain. As technical experts, we evaluate seal integrity not just by material, but above all by the closure system, which remains the critical point of any product. A properly sealed roll-top closure, made with at least three full rolls, is often the most effective defense against water entry.

When choosing the volume of your bag, keep in mind that rigid or semi-rigid material needs space for the closure. Never fill the bag to the brim, as this would compromise your ability to seal the top edge. Duffels with waterproof zippers offer more convenient access, but require consistent maintenance - especially removing salt crystals that can dry out the gaskets and cause infiltration over time.

Always consider your transport needs: if you frequently move between dock and boat, backpack-style straps offer better weight distribution than a single handle. At Nautiba we assess material compatibility based on your stowage requirements. If you have questions about the IP rating or the type of closure for your intended use, contact us before ordering to discuss the most suitable solution for your type of vessel.

Material matters: heavy PVC resists mechanical abrasion on deck or in the cockpit, while lighter coated fabrics are useful for protecting electronics or clothing inside damp lockers. Always consider the load you will be handling, and verify that the seams are heat-sealed - not just sewn - to guarantee complete waterproofing of the finished product.

Criteria for Selecting the Right Bag

• Always check the type of closure: the roll-top system is more secure for temporary submersion, while a waterproof zipper is practical for frequent access.
• Check the actual liter capacity, keeping in mind that a roll-top closure requires approximately 10-15 cm of unfilled material to function correctly.
• Favor high-visibility colors if you plan to use the bag in open water or for safety-related activities.
• Make sure the material is UV-resistant - this is essential if you leave the bag exposed in the cockpit during long summer days.

What does the IP classification mean for a bag?

The IP designation defines the level of protection against solids and liquids. For nautical use, look for ratings such as IP67, where the 6 indicates full dust protection and the 7 indicates resistance to temporary water submersion.

How do you maintain the seal on a waterproof zipper?

Waterproof zippers need frequent cleaning with fresh water to remove salt that dries out the gasket. Periodically apply the specific lubricant supplied by the manufacturer to maintain smooth operation and closure integrity.

Do dry bags float?

Many dry bags, when properly sealed with air trapped inside, can float. However, they are not certified life-saving devices and must not be used for the buoyancy of people or heavy equipment.

Is a transparent or opaque bag better?

A transparent bag allows you to quickly identify the contents without opening the closure, which is useful for small emergency supplies. Opaque bags are generally more robust and better protect contents from UV degradation.

What should I do if the bag gets punctured?

A puncture immediately compromises waterproofness. If the material is PVC, heat-activated repair kits or specific adhesives are available, but for critical or electronic equipment it is always safer to replace the container after any structural damage.