Sea to Summit eVAC Dry Sack


Manufacturer Description

The new eVAC Dry Sack is a slimmed-down version of our award-winning eVENT Compression Dry Sack. We use waterproof, air permeable eVENT fabric on the base for valve-free air expelling, allowing compact packing. Instead of straps for compression, you just roll the sack down and air is pushed out of the base. Then close the buckle and you’ve saved space. The sack is oval-shaped, rather than round so they resist rolling when laid on their side. Suitable to keep contents dry in any wet situation where the bag is not submerged.


  • Air permeable, waterproof eVENT fabric base
  • Valve-free air expelling design for compact packing
  • Space saving, low profile, streamlined shape
  • Oval base resists rolling, stays where you put it
  • Waterproof non-wicking Hypalon roll top closure
  • 10,000 mm waterhead rating, lightweight durable nylon fabric
  • All seams are double stitched and tape sealed
  • Reinforced stitching on stress points
  • White interior for better visibility of contents
  • Available colors – Grey & Blue
  • Available Sizes – 3, 5, 8, 13 (tested), 20, 35, & 65 Liters
  • Measured size 13 L (793 cu in)
    • Weight – 69 g (2.4 oz)
    • Dimensions – 51 cm tall x 23 cm wide x 15 cm deep (20 in x 9 in x 6 in)
  • Retail – $25

YMMV Review

Things like stuff sacks get little love when it comes to press, marketing, and reviews. I figured I would help show them some love by doing a review of the Sea to Summit eVAC Dry Sack. This is not your ordinary stuff sack, which is why it deserved some love.

eVent Sack Bottom

Sea to Summit is named after one of the company’s founders that truly went from the sea (Bay of Bengal in India) to the summit (Mt. Everest) on a solo expedition in 1990. The company now focuses on carefully thought out but affordable outdoor equipment. The brand focuses on many of the little things that are often overlooked but is growing into some of the larger items as well. The company is based out of Australia.


I used this dry sack on two of my late-season backpacking trips. On one trip, I used it for my down sleeping bag and on the other I used it for clothing. Both I prefer to be dry for obvious reasons, and of course, it did not rain on my trips. To do a bit more testing I played around with the eVAC Dry Sack in my sink to test the waterproofing.

Design ★★★½☆

Construction (50%) ★★★★☆

Features (10%) ★★★☆☆

Materials (10%) ★★★★☆

Packability (10%) ★★★½☆

Sustainability (10%) ★☆☆☆☆

Weight (10%) ★★★½☆

The Sea to Summit eVAC Dry Sack is a waterproof stuff sack. The sack is made of two main materials: a lightweigh durable nylon fabric and eVENT fabric. The nylon fabric makes up the bulk of material. It is waterproof to 10,000 mm and does not let air pass through it either. The base of the sack is made of eVENT waterproof fabric. The eVENT fabric has an ePTFE laminate sandwiched between two fabrics. This laminate has lots of tiny pores that water is too big to fit through, but air can pass through. This is what is known as air permeability and is the basis of what makes this sack special. The inside of the sack has reinforced stitching at the stress points, and over the top of this stitching is seam tape to provide a watertight sack.

Roll-Top Clip & Loop

The eVAC Dry Sack is shaped like an oval so it will not roll around when laid on its side. This is important to anyone who climbs as once you have climbed up you really do not want to retrieve something that has rolled back down. This can be a real buzz kill. The roll-top closure is made of waterproof non-wicking Hypalon. It is important that this fabric is non-wicking as a wicking fabric could pull moisture into the dry sack, and that would negate the whole purpose. The roll-top clips together with a plastic clip at the top and has a small ring if you need to clip it to something. The inside of the Dry Sack has images and instructions in six different languages. I am not sure why the instructions are necessary but maybe some people might need the help. The interior of the sack is white to help you be able to find what you are looking for. The sack packs down small when not in use and is also very light.

The only know on the design of the eVAC Dry Sack is it is not made of sustainable materials to my knowledge. I know with many waterproof fabrics on the market there has not been any viable options as of yet. It would be nice if some could be found.

Performance ★★★★☆

Ease of Use (15%) ★★★★½

Versatility (15%) ★★★★☆

Water Resistance (70%) ★★★★☆

The Sea to Summit eVAC Dry Sack worked well both for my sleeping bag and clothing. The way the sack works is you put in it whatever you want to keep dry. Shut the top and roll it up with the Hypalon material to the inside. Roll it over at least three times to make sure it is tight. Then you can just compress the sack, and the excess air will push through the eVENT bottom. When you have the sack compressed as far as you would like you are good to go. I found the sack very easy to use. Pushing the air out does take some time and effort, so I suggest getting out as much air a possible before rolling up the top to save time. Check out this video below if you want to see it in action.

Instructions inside, White Makes it Easier to See Stuff

The eVAC Dry Sack packs into a back pack well, especially when squished down small. I had no issues with leakage on my trips, especially since it did not rain. In my testing at home the sack proved to be completely waterproof. Sea to Summit says the sack is not intended for submersion, if you need a Dry Sack for that purpose, they make those too. The oval shape proved to work well, and since this comes in so many sizes it is easy to find a size that will work for your intended purpose. The eVAC Dry Sack should be really durable assuming you take the proper care of it. Try to avoid situations where there may be a very abrasive or sharp object. Both can negatively impact the waterproof capabilities of the bag. Apart from avoiding those objects the sack is very well made. The stitching is solid and reinforced in places. This seems very well made but if anything changes, I will update this review.

Overall ★★★★☆

Overall, I have been impressed by the couple items I have tested from Sea to Summit. While there is not a lot you can do with a dry sack, the eVAC Dry Sack has a lot of features you might not think of. I would definitely recommend the eVAC Dry Sack for any adventures where you need to keep stuff dry and packed away. I have primarily used it thus far on hiking trips but plan on using it on bike touring adventures as well. The Sea to Summit eVAC Dry Sack retails for $25 in the 13 Liter version I tested, which is a bit more than the more basic dry sacks, but it should last a long time making it a descent value. If you are interested in my other review of the Sea to Summit Pack Tap just click on this link: As always, your mileage may vary.

Pros [field name=iFrame]

  • Waterproof
  • Lightweight
  • Compressible
  • Available in many sizes
  • Well made


  • Must avoid sharp and highly abrasive objects
  • More expensive than basic dry sacks


About the Author

I am an avid runner, cyclist, swimmer, hiker, climber, skier and many other activities that would make this list too long. I started Your Mileage May Vary Reviews in Early 2011 to combine two of my passions: sports and gear.

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