Frequently Asked Questions

SealLine products use three ratings to describe water resistance:

  • Splashproof: Withstands light rain and splashes. Only some of our products fall into this category. Suitable for use where light water resistance is sufficient, such as summer backpacking.
  • Waterproof: Withstands quick submersions and will float if dropped in the water. Most of our bags fall into this category and are suitable for canoe, kayak and rafting use where boats may tip, flip or be swamped.
  • Submersible: Withstands 1 meter of submersion for 30 minutes (IP-67 standard). Suitable for use in extreme and prolonged wet situations.

With such ratings, water resistance depends on the user carefully and properly sealing the closure. For roll-top closures, this means a minimum of three tight, wrinkle-free rolls. For zipper closures, the zipper must be completely and properly closed.

Our premium polyurethane-coated (aka, PVC-free) dry packs offer significantly greater puncture and abrasion resistance than vinyl-coated dry packs, while also being lighter weight. For example, our PVC-free dry packs weigh approximately 8-14 oz. less than our vinyl-coated dry packs. In addition, the PVC-free polyurethane coatings are less harmful to the environment than vinyl coatings.

Our vinyl-coated dry packs and duffles are economical and resistant to punctures, tears, and mildew. They remain pliable at low temperatures and resist cracking.

Our exclusive DrySeal roll-top closure is easily identified by its two separate stiffening strips below the opening of a roll-top product. This makes it easier and more intuitive to achieve an optimal seal—for the first “roll” in closing the top, simply fold the top over between the two strips of material, then roll closed at least two more times.

This design also amplifies protection from the elements by adding an additional “virtual” roll.

We recommend a minimum of 3 folds (aka “rolls”) to properly seal a roll-top dry pack or duffle. For an optimal seal:

  • a. Make sure the stiff sealing strips are wrinkle-free. Close the pack/duffle so that the sealing strips are pressed together
  • b. While holding strips together, push down to “burp” out trapped air. Once trapped air has been “burped” out, tightly fold the top over several times so that the roll-top closure has been folded at least 3 times
  • c. Connect the buckle in the direction opposite to the direction the material was folded, or along the sides when side buckles are present (e.g., WideMouth™ duffle; some portage packs)

All of the dimensions we list for our roll-top dry packs and duffles are the dimensions of the product when it has been properly sealed (tops rolled down three times and secured).

Yes. Our Zip Duffle is made with a YKK zipper with injection-molded teeth, which is the same kind used in dry suits. It is indeed submersible (meets IP-67: 1 meter submersion for 30 minutes), and the zipper is protected from abrasion by a vinyl over-flap. This helps make the Zip Duffle our most protective product.

Our dry packs and duffles are sized volumetrically in liters. To help illustrate how those volumes translate to real world use, here are some general ideas of what fits in various sizes of dry packs and duffles:

  • 20L = a common day size; fits most items one would carry on a day trip
  • 30-40L = a small weekend size; fits most things you’d carry for an overnight trip
  • 70L = a long weekend size; fits a couple days’ worth of gear and food
  • 115L+ = this is the largest size we make; think of this as the “everything and the kitchen sink” size—it holds a lot of stuff

Our Pro portage pack has a height-adjustable shoulder straps, allowing you to fine-tune comfort and support. To adjust the height of the shoulder straps:

  • 1. Lay the (empty) pack on the ground with the shoulder straps up
  • 2. Undo the center hook and loop straps in the middle of the shoulder strap harness
  • 3. Lift harness up and away from the pack, pulling the hook and loop straps through the laddered slots
  • 4. Adjust the harness location to best suit your needs
  • 5. Once the preferred location has been identified, thread the two hook and loop straps back through the laddered slots (only one laddered slot should be unused between the top and bottom straps), ensuring that the straps thread fully through each slot and the supporting framework
  • 6. Re-secure the hook and loop straps that were undone in step 2, securing the top strap (closest to the haul handle) first, followed by the bottom strap (closest to the waist belt)

All of our Boundary and Black Canyon portage packs have removable shoulder straps. If you would like to remove the shoulder straps for transport (e.g., securing pack to the roof of a vehicle or in the bed of a truck, or to streamline the pack for airline travel), follow these steps:

  • 1. Undo the center hook and loop straps in the middle of the shoulder strap harness
  • 2. Unthread the four webbing straps that connect the shoulder straps to the pack
  • 3. To reconnect the straps to the pack, simply reverse the above steps

Yep! In simplest terms, folding the top corners of the pack inward before closing it will help improve your visibility when looking over your shoulder. There’s one technique in particular that we’re fond of—we call it the “Burrito roll”:

  • a. Grab the top corners of the pack and fold them inward a couple inches (like the sides of a tortilla for a burrito)
  • b. Crease the plastic stiffening strip at the top of the pack, helping create a hinge
  • c. Roll the top down and secure it with the easy QuickClip™ per usual
  • d. If you like this method, you can cut the plastic on the fold line to make folding easier in the future

Welded seams use radio frequencies (RF) to join two pieces of coated fabric together at the molecular level, effectively bonding them together as one. This strong, reliably waterproof construction method is far superior to sewn-and-taped seams.

With sewn-and-taped seams, two pieces of coated fabric are held together with thread and a piece of protective tape is placed over the threads and seam to provide water protection. A RF welded seam can withstand up to 2x more stress than a sewn-and-taped seam, resulting in a more protective and longer-lasting seam. This is why we use welded seams with all of our dry bags.

Regularly cleaning and maintaining your dry pack or duffle will substantially increase its life. After each use, dry packs or duffles should be cleaned and aired out. Dirty packs or duffles can be washed with a soapy sponge and rinsed, allowing them to air dry. Store clean dry packs or duffles completely dry, inside out. Keep all insect repellents and solvents from making direct contact with dry packs or duffles—if contact occurs, wash the pack or duffle thoroughly.

For vinyl-coated dry packs or duffles, such as our Pro™ and Boundary™ packs or Zip™ and WideMouth™ duffles, an occasional wipe down with a vinyl preservative, such as Armor All®, will help maintain the vinyl-coated pack or duffle’s suppleness. (Armor All® is an Armor All Products registered trademark.) Use of a vinyl preservative is not necessary for polyurethane-coated (aka, PVC-free) dry packs or duffles.