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Award-winning waterproof & ultralight compression dry sack. Learn more.
$39.95 - $49.95
We recommend a minimum of 3 folds (aka “rolls”) to properly seal a roll-top packing system sack. For an optimal seal:
Our packing system sacks are sized volumetrically in liters. To help illustrate how those volumes translate to real world use, here are some typical things you might put in various sizes of packing system sacks:
Regularly cleaning and maintaining your packing system sack will substantially increase its life. After each use, packing system sacks should be cleaned and aired out. Dirty sacks can be washed with a soapy sponge and rinsed, allowing them to air dry. Store clean packing system sacks completely dry, inside out. Keep all insect repellents and solvents from making direct contact with packing system sacks—if contact occurs, wash the sack thoroughly.
SealLine products use three ratings to describe water resistance:
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.
All of the dimensions we list for our roll-top packing system sacks are the dimensions of the product when it has been properly sealed (tops rolled down three times and secured).
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.
These purge valves let you easily vent excess air trapped within a sealed packing systems sack without compromising water protection. Venting trapped air prevents the bag from “ballooning”, helping it compress and save valuable space. We selectively use these valves on products that may frequently be strapped down and/or compressed and stowed in tight spaces.
BlockerLite Dry Sack
BlockerLite Cinch Sack