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Sea to Summit eVent Compression Review

A classic lightweight stuff sack with the added bonus of waterproof material
Sea to Summit eVent Compression
Photo: Sea to Summit
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Price:  $48 List | $24.71 at Backcountry
Compare prices at 3 resellers
Pros:  Lightweight, easy to use, good compression design
Cons:  Not for use as a stand-alone bag
Manufacturer:   Sea to Summit
By Maggie Brandenburg ⋅ Senior Review Editor  ⋅  Aug 2, 2021
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63
OVERALL
SCORE


RANKED
#10 of 14
  • Waterproofness - 50% 7
  • Ease of Use - 30% 5
  • Features - 10% 7
  • Durability - 10% 6

Our Verdict

Nothing puts a damper on a backpacking trip quite like crawling into a soggy sleeping bag at the end of a long day. With the Sea To Summit eVent Compression as your stuff sack, you can hike assured your sleeping bag will be warm and dry when you make camp for little to no added weight. This lightweight dry bag is designed with all the classic features of a stuff sack plus the bonus of being waterproof. It also sports a clever venting feature that allows air to escape to make stuffing easier while simultaneously preventing water from seeping back in. Very few dry bags can also easily compress your stuff, but this one does it fairly well.

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Overall Score Sort Icon
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86
71
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69
Star Rating
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Pros Lightweight, easy to use, good compression designVery waterproof, clear window, easy to locate things, sturdy buildGood water protection, easy to use, replaceable clipLightweight, rectangular shape, simplicity is a featureLightweight, good protection, simple to use
Cons Not for use as a stand-alone bagFlat shape is odd, extra access stepSingle stitching, not tall enough to roll properlyNot abrasion resistant, must be part of a systemLimited size options, less impressive construction
Bottom Line A classic lightweight stuff sack with the added bonus of waterproof materialA seriously waterproof bag we trust with our most sensitive items at a very nice priceAn inexpensive windowed dry bag with solid water resistance and some easy to use featuresFor backpackers and day hikers, this model is a packing cube dry bag hybridA simple, lightweight dry bag that lets light in and is easy to use
Rating Categories Sea to Summit eVent... NRS Ether HydroLock Sea to Summit View... Osprey Ultralight D... Outdoor Research Be...
Waterproofness (50%)
7.0
10.0
8.0
7.0
8.0
Ease Of Use (30%)
5.0
7.0
6.0
8.0
6.0
Features (10%)
7.0
8.0
7.0
6.0
5.0
Durability (10%)
6.0
7.0
6.0
5.0
6.0
Specs Sea to Summit eVent... NRS Ether HydroLock Sea to Summit View... Osprey Ultralight D... Outdoor Research Be...
Weight 4.3 oz 2.3 oz 1.7 oz 1.6 oz 1.0 oz
Tested Size (liters) 20 L 5 L 4 L 20 L 3 L
Closure Type Roll-top HydroLock and roll-top Roll-top Roll-top Roll-top
Included D-Rings? No Yes Yes No No
Style Roll-top w/ lid and compression straps Roll-top Roll-top Roll-top Roll-top
Material 70D nylon 30D silicone-impregnated ripstop nylon, urethane window 70D nylon, TPU window 40D ripstop nylon 40D siliconized ripstop nylon, PU coating

Our Analysis and Test Results

The Sea To Summit eVent Compression is 20 inches tall with a 9-inch diameter and a total volume of 20 liters. It's made of 70D nylon with an eVent fabric bottom that allows air out but prevents water from getting in. It has all the familiar features of a sleeping bag stuff sack, including compression straps and a pull handle on the bottom.

Performance Comparison


This model looks just like your average sleeping bag stuff sack but...
This model looks just like your average sleeping bag stuff sack but also provides great protection from water.
Photo: Leslie Yedor

Waterproofness


This model does remarkably well in this metric. From casual use to more intense testing, everything stayed dry inside the eVent throughout testing. When we held it underwater, tons of bubbles escaped, but no moisture crept inside the bag. Our testing towel remained completely dry after submersion and after being dragged through the water. This isn't even really what this dry bag is designed for, so we were impressed.

While some other models we tested are burlier and more waterproof, they are also much heavier and would be serious overkill for a sleeping bag stuff sack. Despite having relatively thin fabric, the eVent never soaked through or let its contents get wet at all. This performance may change over years of use as the fabric treatment ages in ways that tarpaulin dry bags just don't. For our summer of rigorous testing, though, it proved to be quite impervious to water. If you're backpacking all day through a downpour in the Pacific Northwest, this is the kind of security you're going to want.

Our testing towel was completely dry after this model was submerged...
Our testing towel was completely dry after this model was submerged and dragged behind a paddle board.
Photo: Leslie Yedor

Ease of Use


Using the eVent Compression for the specialty purpose of a sleeping bag stuff sack couldn't be easier. To remain watertight, most dry bags are also airtight or at least resistant to air moving through the fabric. This would make stuffing a sleeping bag inside and compressing it down a near-impossible challenge. This model has the ingenious addition of its namesake, the eVent, on the bottom, which allows air to exit, making stuffing and compressing not only possible but a quick and easy task. While many other lightweight models may seem like an alluring choice for backpackers, most of them lack this ability to easily expel air, which makes them a challenging choice for a stuff sack.

The lip of this bag is more typical of a dry bag and closes using the classic roll-top design of most models we tested. It is simple enough to roll it closed, pull the compression lid in place, and strap it down, just like a regular compression sack. This is an improvement over some other compression models we tested that have no lid, which then puts a lot of pressure on the roll-top when constricted. The eVent keeps pressure off your seal while you squeeze the contents down, much more like a traditional compression sack. However, if you plan to use it as more than a sleeping bag stuff sack, this model fails to provide internal organizational options for small items and is exceptionally long and narrow. It's a pain to get in and out of while you're out in a kayak just looking for a snack. In fact, this bag is really only good for things you don't need easy access to on the water — like a sleeping bag. It also has no carrying straps, and it is easier to transport inside another bag than on its own.

The venting feature makes this model simple to stuff and even easier...
The venting feature makes this model simple to stuff and even easier to compress.
Photo: Leslie Yedor

Features


The eVent Compression has all of the typical features of a sleeping bag stuff sack, compression sack, and general dry bag, all rolled into one. It has a typical flat bottomed cylindrical shape, a roll-top with a clip, the compression lid plus straps, and a pull handle on the bottom. The eVent at the bottom is what makes this bag truly wonderful. This feature allows air to escape while it is being stuffed and compressed but prevents water from returning into the inner compartment.

The eVent does not feature any D-rings or lash points and is meant to be stored inside an outer bag or backpack. You could use it on its own — it's that waterproof — but for durability reasons, its thin fabric is best protected by another, beefier bag.

A pull strap on the bottom makes unstuffing your sleeping bag a...
A pull strap on the bottom makes unstuffing your sleeping bag a quick job.
Photo: Leslie Yedor

Durability


To live up to the prerequisite weight standards for lightweight backpacking gear, the eVent Compression is forced to sacrifice some durability. The lightweight 70D nylon isn't ripstop and will never be as resistant to cuts, scrapes, and tears. The thin material of this model is not very durable when outside of a backpack, but it is strong enough to withstand abrasions from being shuffled around inside a pack. With that being said, the eVent stayed intact throughout all of our testing, which was done without an external pack's added protection. The same cannot be said for all the other ultralight models we tested.

Thin material makes this model prone to damage unless its used...
Thin material makes this model prone to damage unless its used inside a larger pack.
Photo: Leslie Yedor

Another important component of a good compression sack is the compression straps themselves. While other similar models we tested have thin straps weakly attached by thin stitching (and many other reports of failings), the eVent straps are solid. We had absolutely no problems with them during our testing.

This model is your classic sleeping bag stuff sack but with a...
This model is your classic sleeping bag stuff sack but with a waterproof twist.
Photo: Leslie Yedor

Other Sizes
Sea to Summit makes the same model in five different sizes, 6, 10, 14, 20, and 30 liters. We tested the 20-liter model, which is the perfect size for a 100% down, 3-season men's large sleeping bag. Other sizes may be a better fit for different sleeping bags, and the smallest models would be ideal for protecting down jackets and other clothing.

Value


The eVent Compression is reasonably priced for a mid-sized dry bag. It's not our absolute favorite compression dry bag, but we still like it a lot and find it useful and reasonably priced.

Lots of bubbles escape as the eVent successfully lets air out but...
Lots of bubbles escape as the eVent successfully lets air out but keeps water from seeping back in.
Photo: Leslie Yedor

Conclusion


The Sea To Summit eVent Compression is a great choice for a sleeping bag stuff sack when backpacking in wet and rainy environments. It has all the major design features of a stuff sack, it's lightweight, AND it's exceptionally waterproof. Everyone loves a dry bed, and with this product's protection, you'll never face a damp night's sleep in the backcountry again.

The eVent is a nifty piece of technology that allows this model to...
The eVent is a nifty piece of technology that allows this model to be both compressible and waterproof.
Photo: Leslie Yedor

Maggie Brandenburg

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