Sea To Summit Ultra-Sil eVent Compression Dry Sack for Sale, Reviews, Deals and Guides

Great quality, straps compress the bag easily, and worth the purchase. Only mistake I made? Going for the large/20L. For a 3-day trip, it was more than enough. Should have gone with the medium/14L at most. Would have worked had I kept everything in there - insulated jacket, rainwear, etc. - but you'll always want those important pieces readily available.

No more sitting on the sleeping bag to get all the excess air out before it gets packed up. All you have to do is pull on the compression straps and the bag gets nice and compacted.

I picked this up for a Western Mountaineering Alpinlite bag. The bag fits fine, compresses well, and there’s no issues for what I need it to do.

I ordered both a medium and large bag (14L and 20L) mainly as a tester for compressing sleeping bags for my family and myself on backpacking and camping trips. My sleeping bag is a mummy style and pretty large as it fits my 6'2'' and 265lbs frame. It is also about 20 years old so not as high tech as today's offerings. Which means it's heavier and bulky compared to a current 3 season bag. I use 3 season as a rating because when I bought it 20+ yrs ago that was how they were rated them as best as I recal. As a guide I have slept in temps down to about 45F and been warm enough if that helps with a comparison to today's sleeping bags. Anyway, the compression sacks straight out of the box seem pretty decent, they are very lightweight and the eVent system works pretty well indeed. With nothing in the sacks I sealed them and squeezed out the air, just to test things. It was much easier to squeeze than I suspected it would be. The attached pictures show my sleeping bag, the compression sack and a standard Nalgene bottle for scale. I squeezed my sleeping bag into the Large (20L) sack and it was a struggle, I think I need the next size up to fit it properly but it did compress down a fair bit and it was pretty easy compressing it using the straps. As long as you are a standard size and/or don't have a very cold temp rating on the sleeping bag the large (20L) compression sack should fit your bag. I haven't tested it's waterproof capability so can't comment on that but will say that I have dry sacks I use for kayaking that are waterproof but are much, much heavier than this compression sack and for my intended use of compressing my sleeping bag to carry in a backpack it certainly looks like it will keep my sleeping bag compressed and dry so I can now dispense with my kayaking dry bags for these compression sacks. I rated the bags as 4 star as I have yet to test them for being waterproof or see how they hold up to repeated use in the field, when I have that data I will come back and update the rating. Finally, thanks to my gearhead Nicky Rosado for help and guidance along the way to the purchase, I do like the fact that Backcountry has gearheads to ask questions, a big thumbs up in my mind.

This little bag works great and is super waterproof. Mostly use it for clothes to keep everything compressed small at a lighter weight. Works great!

I’m adding to my collection (more sizes) of these bags. Light weight, waterproof and a compression solution for getting precious space back from your sleeping bag and clothing. With the ultra sil construction, recognize this light weight material gives up something in the abrasion and durability categories. But I’m not using these as the only line of defense against water—they are generally in another bag (pack, larger dry bag etc) but work great to compact the goods inside. And, for river trips with down products, I have some extra security in knowing my down sleeping bag is in a couple layers of water proof protection.

First trip out of the package was a two and a half week medical teams trip all over Nepal (in February). This bag packed my 0 degree down bag with SOL bivy inside. It was a super tight fit; however, it never tore or ripped and kept everything dry as well! Great product! --Patrick Bancke Portland, OR patbancke@gmail.com http://www.medicalteams.org

This is a light little bag, and compresses nicely. I use the XXS size to carry a days worth of food for day long hikes. I've only used it for 3 hikes, and it shows no sign of wear.

I got this is a size large for a Western Mountaineering puma GWS bag. The bag fits and the sack keeps water out! Compacts my massive bag to a manageable size

I purchased this ultra-sil dry compression sack to use with my down sleeping bag. However, after examining the bag a little closer, I only use it for clothes and other small items now. Where this is a nice ultralight sack, it just isn't as durable as the original event dry sack. The original version has an additional compression strap, with much thicker and more durable materials. Unless you really need to shed a few ounces, I would go with the original version.

Simply great... have several of these and they´re really well made ... light and waterproof . Once i was totally soaked during a river crossing and my down sleeping bag inside one of these kept 100 % dry as expected. 5 stars for me...

The Large compresses my Nemo Verve long sleeping bag enough to cram it into my osprey Volt 60.

If you backpack a lot, and haven't been using these eVent compression sacks, you're seriously missing out. Beyond keeping gear dry, and compact in your pack, this thing can double as a water-proof bear bag. Its also the best pillow solution i've found on the trail. Don't buy a pillow, just stuff this sucker full of all your clothes, and you're stoked. The ultra-sil version is noticeably lighter than the standard eVent version.

I've had ultralight compression sacks in the past and typically they don't hold up. Seems split, straps tear, and they end up in the trash. These are exceptionally well built. Mine was crammed into my saddle bag on a 6,700 mile motorcycle trip and returned with no wear after a month of use. I purchased the Small size for my WM Versalite 5'6

I got the event compression dry sack to replace my old sack. It works great keeping my sleeping bag dry but it will not compress as small because it only has three compression straps. If it had four straps it would be five stars.

I one to keep my sleeping bag in and one for my clothes. These are great. Very light and very compressible.

This is a great idea, but lacks in construction. Past versions of this compression stuff sack have been great, but Sea to Summit tried to go too light. The buckles are WAY too wimpy and small-- one broke on my first time using this on a multi day ski mountaineering trip and I returned it. It was a bummer to say the least. Also, the stitching and extremely thin material does not inspire confidence when trying to compress your sleeping bag.

I have a few of these already and use them regularly on backpacking and kayaking trips. Very simple and durable bag. Keeps whatever you have in them dry without any worries. The 4 strap compression is nice because it really lets you crank down and make these bags small.

Having a wet sleeping bag is no fun and causes restless nights. I recently upgraded to this compression sack and love it. I even bought one for my girlfriend (now she can carry more group supplies). Win.

perfect fit and compatibility with the CWM EQ Sleeping Bag: -40 Degree Down Regular size. Got the sack in a Large. Great for any adventure in any condition!