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SealLine® Frequently Asked Questions

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WHAT DOES WATERPROOF MEAN?
SealLine’s waterproof bags are constructed with waterproof materials and RF-welded seams. When sealed correctly, our waterproof dry bags will protect your gear from rain, waves and the occasional dunking.
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WHAT IS THE DIFFERENCE BETWEEN VINYL AND NYLON DRY BAGS?
Our vinyl dry bags are economical and resistant to punctures, tears, and mildew. They withstand cracking and remain pliable at low temperatures. We utilize vinyl on our Baja™ and Baja™ Beach bag, as well as our Boundary Pack™, Pro Pack™, and Zip Duffle™. We also use a transparent vinyl with our See Bags, so you can see what's packed inside.

Our nylon dry bags are urethane-coated and offer the best strength-to-weight ratio. Nylon also has a lower coefficient of friction than vinyl, so it is easier to slide bags into tight spaces, such as kayaks, and it remains pliable at extremely cold temperatures.
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WHAT IS SPECIAL ABOUT THE DRY SEAL™ CLOSURE?
Our exclusive design provides the best closure performance of any roll-down dry bag. The bag is held tightly together between paired vinyl strips. Closure instructions are molded directly on the vinyl strips.
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ARE THE MEASUREMENTS OF THE BAGS WHEN THEY ARE ROLLED OR UNROLLED?
The measurements are for rolled bags with the minimum three folds.
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ARE DRY BAGS JUST FOR WATERSPORTS?
No, other activities besides watersports benefit from using our SealLine® dry bags. Travelers have discovered the versatility of our Zip Duffle™, Seal Pak®, and See Bag™. Backpackers and bicyclists appreciate the Kodiak Sac™, which is lightweight and protect gear from moisture.
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IS THE ZIPPER ON THE ZIP DUFFLE™ WATERPROOF?
Our Zip Duffle is made with a four-coil YKK zipper that is indeed waterproof and protected by a vinyl zipper flap. The zipper runs diagonally across the top of the bag, making access quick and easy.
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WHAT DOES THE RATING ON THE E-CASES MEAN?
E-cases meet the International Electronics Commission’s standard for submersible electronics. The symbol guarantees that, when properly sealed, E-cases will protect your gear from getting wet under 1 meter of water for 30 minutes.
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phone: 1.800.531.9531 | email: consumer@cascadedesigns.com