Keep Gear Dry with SealLine Blocker Zip Sack

For those who are organized (and even for those who are trying to fake it) packing systems are a life saver. Before multi-use systems came along, we were using stuff sacks or zip-lock bags. Now, we have a variety of packing systems to choose from.


When it comes to packing my gear for a trip that involves any amount of water, SealLine Blocker Zip Sacks are the first things I grab. Since I live near the ocean, they’re even useful to me at home, which is somewhere I’m spending much more time lately.


Made from lightweight 70D polyurethane-coated nylon material, these bags are versatile and have solid splash protection when you’re on land or sea. They have fully welded seams, which keeps them strong and durable, no matter where you take them. Zippers open widely, so you don’t have to peer in to a tiny opening to find your belongings, and you can grab your things quickly without having to spend the time to search.


It’s important to know the difference between splashproof, waterproof, and submersible in assessing your needs when buying items that carry any of these labels. Splashproof items withstand light rain and splashes (think summer backpacking or poolside lounging). Waterproof things withstand quick submersions. Submersible items can withstand 1 meter of submersion for 30 minutes.


The bags are part of SealLine’s PackTight packing system, and incorporate flat-sided, rectangular shapes that can nestle closely together in your bag. They pack more efficiently than rounded sacks, saving even more space. They’re also awesome on their own, when you need just a small carrying bag for a quick jaunt.


The Blocker Zip Sack comes in orange or navy colorways and three sizes: small ($21.95), medium ($26.95), and large ($31.95). All are available at the Cascade Designs’ SealLine site.


Jill Robinson is a freelance writer who lives in a small California beach town near the big wave surf spot, Mavericks. She divides her time between writing about travel, running a kayak business and trying to wring awe-inspiring adventure out of every day. Her articles have been featured in the AFAR, National Geographic Traveler, Outside, the San Francisco Chronicle, and more. Catch up with her adventures on and IG/Twitter at dangerjr.

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