What can I say, these are well made and they just do what they are supposed to do, compress the heck out of what you put in them. You don't have to be afraid to bear down on these as they can take it in stride. The straps are long enough to ensure you get all the compression you need. The fact that they are waterproof is a bonus. Really sweet compression sacks.

this sack is sweet. I use it to compress my Montbell SS Down Hugger #1 sleeping bag. At first I was thinking there was no way to do it...but compress baby compress!!!! And it being water proof is the main reason I got it, keep that sleeping bag dry for a good nights sleep.

this sack is sweet. I use it to compress my Montbell SS Down Hugger #1 sleeping bag. At first I was thinking there was no way to do it...but compress baby compress!!!! And it being water proof is the main reason I got it, keep that sleeping bag dry for a good nights sleep.

Took this bag on a four day test run down the river. The bag leaked every day. Tryed different methods of rolling the top, different number of rolls, different tightness. I worked pretty hard trying to get the bag to work out, drying it overnight and trying again the next day. perhaps I got a bum bag, but to keep important things dry, I do not recommend.

These things are great. I tested it out with some tshirts in it and dunked it in a pool and the shirts were completely dry. I would trust anything that cannot get wet in this bag. This bag will keep your sleeping bag dry on all the long and wet hikes you take

This is a great stuff sack that I picked up on a super sale. It does exactly what is says, allows air to pass out of the bag while compressing... and remains waterproof. My sleeping bag went swimming on a canoe trip (along with the rest of my gear) and emerged dry as a bone. Durable, light, simple... just not cheap.

I bought the XS originally for my down sleeping bag, but I could only get it to close after 15 minutes of effort, so got a S and it works perfectly. Keeps everything dry and well compressed. The eVent on the bottom is awesome. I kept the XS and it works really well for keeping a spare outfit dry. I also use it on kayak/canoe trips to hold my lunch, camera, sunscreen, etc.

Really a great buy, and I've had no problems with leaking even though I completely submerged it.

This bag is amazing. Totally waterproof and excellent compression plus it just looks cool. Also you can't beat the price! For an extra $5 you get a totally waterproof sack to protect your gear. I use my small for a 15 degree down bag and there is still a little room to spare

I bought this to help protect my Big Agnes Pomer Hoit 0 degree down bag (awesome bag by the way...), and it is awesome. NOTICE: It is NOT meant to be submerged by any means, and it says that in the description. It will hold up if it falls out the canoe or gets heavy rain, but when you put it under water the pressure tries to equalize and forces water into it. If you want something that works, I would go with this b/c I have used it for a 2 years now and have not had a problem with it.

PERFECT. I got one to compress my sleeping bag on a motorcycle trip. I was so happy with this product I have purchase 2 more of them! Works great for compressing the tent and clothing.

I have this same bag and never leaked. You do have to roll the top at least 3 times.
If your's leaks then you should test it by filling with water and check for seapage after awhile.
Two rolls of the top does leak a bit, not alot, just enough to irk ya.

1. waterproof - yes I've thrown in in the lake. no leaks, note i didn't leave it there for more than a min. but that's good for me
2. unlike a lot of sacks out there it's hard for me to max out on the straps wile compressing. nothing more annoying than still being able to squish the sack down more with my hands but the strap is pulled all the way out.

Great compression sack, not a leak. Solid construction. I got one size up and use it as a a waterproof bag to hang my food at camp once my sleeping bag is unpacked.

The crappy stuff sack that came with your sleeping bag - throw it away. Or use it for something you don't mind getting wet. If you really care about keeping your sleeping bag dry, buy one of these. If you don't like rockin' a pack cover on your backpack in the rain, buy one of these.

I gave up on pack covers a couple years ago, seems that when it rains, its usually windy too. And who wants to stop to put on a pack cover in the rain and wind while they're hiking? Use this and you can keep on trekking without worry about your sleeping bag getting wet in a sudden rainstorm.

That's bout all I can say for this sack is WOW!!!! I'm an ol skewler and have recently gotten into the ultralite/lightweight packing in the last year. Been gearing up for the AT next year and have poured over Backcountry.com and Backpacker magazine for tips on what gear to purchase. I've never used a dry sack, ever to be honest, but knew I would need some form of one for at least my sleeping bag. I own the Lafuma X950 Pro so I bought the Small sized event dry compression sack. I haven't tried it out in wet conditions...but after all the gear reviews I have read here and various other places I am confident my bag will be safe from water. However, if you are new to roll top closure bags there is a learning curve; don't feel ashamed to have to conjure up a gear head through the online chat feature here to get some advice on exactly how that works, lol!!! Long story short, once I finally figured out how this thing closes up I pulled my sleeping bag out of its tote bag and stuffed it in my event sack. After kneeling down on my bag with one knee I was able to cinch the compression straps within an 1/8 inch of their maximum. To put it in a nut shell I just cut 6 inches vertical packing height (if I remember my math correctly that wouold be 42 cubic inches altogether since its app. 7 in diameter...may be wrong) from my packing interior of my bag. That may not seem like much but I am only using a 3000 cu. in. pack for the AT so app. 42 cu. in. is a world of difference in this pack. I guess the lafuma pack bag now gets duty for something else that doesn't need water protection. Some people may think the price for this item is steep, but to me it is worth every penny just for cuttin down on packing volume, I'll say it again, "WOW!!!!" If you're interested in this then I highly recommend because these compression straps haven't budged one bit and loosened up since I cinched it all down...nice!!!!! I will be getting more of these for my clothing and electronics.

That's bout all I can say for this sack is WOW!!!! I'm an ol skewler and have recently gotten into the ultralite/lightweight packing in the last year. Been gearing up for the AT next year and have poured over Backcountry.com and Backpacker magazine for tips on what gear to purchase. I've never used a dry sack, ever to be honest, but knew I would need some form of one for at least my sleeping bag. I own the Lafuma X950 Pro so I bought the Small sized event dry compression sack. I haven't tried it out in wet conditions...but after all the gear reviews I have read here and various other places I am confident my bag will be safe from water. However, if you are new to roll top closure bags there is a learning curve; don't feel ashamed to have to conjure up a gear head through the online chat feature here to get some advice on exactly how that works, lol!!! Long story short, once I finally figured out how this thing closes up I pulled my sleeping bag out of its tote bag and stuffed it in my event sack. After kneeling down on my bag with one knee I was able to cinch the compression straps within an 1/8 inch of their maximum. To put it in a nut shell I just cut 6 inches vertical packing height (if I remember my math correctly that wouold be 42 cubic inches altogether since its app. 7 in diameter...may be wrong) from my packing interior of my bag. That may not seem like much but I am only using a 3000 cu. in. pack for the AT so app. 42 cu. in. is a world of difference in this pack. I guess the lafuma pack bag now gets duty for something else that doesn't need water protection. Some people may think the price for this item is steep, but to me it is worth every penny just for cuttin down on packing volume, I'll say it again, "WOW!!!!" If you're interested in this then I highly recommend because these compression straps haven't budged one bit and loosened up since I cinched it all down...nice!!!!! I will be getting more of these for my clothing and electronics.

I got this to protect my down bag in wet environments and it keeps it totally dry and compresses to an smaller size. The straps are strong and the bag is durable. Can't complain about this bag in any way.

I don't have anything negative to say about my eVent dry sack. It keeps everything dry, it's lightweight, and the compression really saves space. I've beat it up pretty good and there aren't any signs of wear as of yet. I have not submerged mine in water but I have used it in rain and it has held up as advertised. The price may be steep but the piece of mind of having dry stuff is worth it.

Bought this for my down sleeping bag. Being in the PNW we see a lot of rain and it keeps my bag completely dry. For the test before I hit the trail I submerged it(which it instructs you not to do) in the tub to see how it worked. The sack just rocketed back to the surface and when I opened it there was no moisture. Highly recommended.

I've gone on several weekend kayak trips with this bag. It's been submerged underwater for several minutes, yet it still kept my sleeping bag dry. I will be buying these for all of my gear.

Nice and light. I can fit my sleeping pad and my -25F down bag in the XL size without too much wrestling.

I have not dunked the bag but it did shed water on my last trip. It does compress very well but be sure to leave a few inches at the top so you can properly roll the top down. I found that to be my biggest issue before the bad is compressed. It is very easy to compress and will allow people to get ever smaller packs. One day, we will only need purses...

I was worried about how much i could pack into the sack along with my sleeping bag and how small it would compress down to when i bought it. Even more worried when i saw the package it came in, but this compression sack is really cool. For its size (I bought the large) this thing hold alot. I was able to fit in a quite large sleeping bag (normally about 16x9) along with three pairs of socks, 4 pairs of boxers, 3 tee shirts, a pair of pants, and a thick sweat shirt down to about the size of a medium watermellon. Didn't get to test it much with water, other than water container condensation, so i don't want to say anything untrue. Pretty easy to get compressed down once you figure it out, and the way it vents air makes life so much easier.

I use the Sea to Summit dry sacks over any other compression sack out there. The sacks are durable, compress well, and keeping out water is a great bonus.

I used this pack on a week long sea kayaking trip. On the second day it got real choppy and the compartments became full of water lucky for me this great design paid off and my bag stayed dry. Thanks Sea to Summit!

As for the compressibility of this bad boy, nothing comes close. I got two (one for my sleeping bag and one for my clothes ) and they worked great for giving me more space in my pack. I used them for a trip this past week into the Smokies (Clingmans Dome area) and while we were camping one night, we got a pretty solid rainstorm for about an hour. We had one we were using as a bear bag and we didn't have it covered or anything so it got the full force of the rain. When I checked it the next morning, there was some moisture on the inside of the bag (uh-oh) but nothing was soaked, just sort of damp. Fortunately we didn't have anything in there that NEEDED to stay dry. Overall, I think this bag would be good for backpacking because it gets stuff to such a small size and you've still got your pack to keep out the rain, but if its just this sack and water, I'm not sure how dry your stuff will stay.

I am really happy with the way this bag performed. Be careful about pulling the straps the wrong way though, I got a little agressive with mine and the stitching came undone a little where the buckle straps connect to the eVent material. It worked just like the description says though, and it is a pretty cool bag..

Went on a group camping trip with a college club and somehow one of these bags ended up in my tent. Upon asking the entire group if it belong to anyone, no one claimed it. Let me just say this bag is amazing compared to the junk sack that came with my sleeping bag. The size is Medium and right now I've got it stuffed to the top with clothes and after compressing the bag, it's now half the starting size and it isn't even showing any signs of blowing a stitch. I have yet to test the waterproofing, but most likely will this weekend since the forecast calls for rain. So, as of now it looks very promising, and I'd recommend it to anyone looking for a good compression sack.

I am using the Sea to Summit dry sack in several different sizes when I kayak. I think they are awesome and work very well for my sleeping bag, clothes, etc. And they keep everything dry. I can't wait to take them to Africa so I can pack more in my backpack and still take everything I want!

These are the real deal. Used one for my tent, my down bag and all my clothes on a backpacking trip. It was wet and raining the whole time. Everything stayed dry and I was not gentle on these and they held up. I've never used another brand and never will. Don't waste your time with other brands these are well worth the money, you wont have to buy anything else ever!

I love this compression sack, it's small and light and it works fabulously. I put my sleeping bag a thin shirt and down vest in it and for the first time I didn't worry about my gear getting wet because I knew I had enough warm items to get by on. It breaths just enough to make it easy to compress but not so much that water could get in. I crashed on my bike in a stream carrying my gear and it was a comfort to not have a soaked sleeping bag that night.

Waterproof! If you need to keep stuff dry and compressed, buy this bag.

Very easy to use, completely waterproof compression sack. Because the eVent material is so breathable, you don't need any extra valves to let the air out, just compress it, and the air goes through the material. I've used this rafting and done the bathtub water test, and have never had a problem with leaking. It is perfect for a down sleeping bag!

This is an awesome waterproof compression sack. Buy one, you won't regret it.