> TEOTWAWKI Blog: SeaLine Dry Bag - Modern Haversack?



SeaLine Dry Bag - Modern Haversack?

A 10L SeaLine dry sack with paracord shoulder strap.
These dry bags come well recommended by kayakers, rafters and others who spend time on the water--they keep gear dry, no matter how wet it might be on the outside. Rain, snow, or dropped into water, these dry bags will keep you gear dry. A couple of other good points:
  • They'll also float, unless you load 'em up with exceedingly heavy stuff--lead or something similar. Filled with air, they'd certainly help you stay afloat if needed.
  • You can smoosh out the air to compress clothes, sleeping bags, etc. in a vacuum-bag like fashion. Not as good, but certainly some added compression over a normal stuff sack.
  • The tough vinyl offers an extra measure of protection from abrasion.
  • You can also use it as a water container--it'll hold around 10L of water, which could be a life saver in a survival scenario. 
  • Emptied of gear and filled with air, they'll also make a decent air pillow.
The bag has a single D-ring, which I've used to attach a paracord loop. This allows for haversack-style shoulder carrying.You could also use more conventional webbing material, which would be more comfortable than the simple paracord.

The 10L dry sack is big enough to carry a basic survival kit like a Dave Canterbury style 10-piece kit. While a basic, shoulder-bag sized survival kit has its limitations, this is certainly an good kit to have on a short hike, scout, etc.

While I prefer backpack carry in most cases, I know there are many who like shoulder bags and old-school haversacks. Due to the waterproof nature of these dry bags, I think they make a superior gear option for that kind of kit, especially if you're going to be on/near water.

Check 'em out on Amazon >

NOTE: The Marines are using a similar bag--a bit more high tech--called the MAC Sack, also made by SeaLine. It has a built in air purge valve to help with the compression. I don't have any first hand experience with the MAC Sack, but the reviews are very good.


  1. There's a few dry bag backpacks out there.
    Dry bags do come in handy when you live somewhere drippy, like the Pacific Northwest.

    1. That's a cool pack, but $140? I hope it's more than a dry bag with backpack straps...cuz you can always just put a dry bag inside a pack!

    2. Just the first one I dug up and yeah, you could always just put the bag in a pack.

  2. Love these things! Absolutely a great addition to a pack/BOB. They basically weigh nothing and have countless functions. They serve as a great bucket--whether for water, wild edibles, they are even tough enough to handle kindling/firewood or what have you. Great item!

  3. I prefer Sea-to-Summit dry bags. I could say a lot about them, I suggest you just google their website. Also, I would check out "Madwater" they have a 3 piece system and the backpack has a 10L waterproof storage space and seperate 2L hydration pack.

  4. Can also be buried underground with little / no damage to contents as well - that is a really useful property.

    1. In a survival setting that would be good, something set up in advance I'd go pelican, seahorse, skb or something with a manual or no purge valve.