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Rated 5 out of 5 by from A solid dry sack! I got the 3L version free with my Osprey Atmos 65 pack and thought it would be some cheap throw-in freebie. This bag is actually pretty dang good! It's not a super fancy ultra-sil bag, but it works. I haven't tried submerging it, but I don't think i'll ever really need it for that as I don't canoe/kayak. It had my snacks in it and I forgot it on a stump overnight in the rain and it kept the contents dry, so it's alright in my book. If you want a nice cheap bag that will protect the contents from rain or dew, I'd confidently recommend this one!
Date published: 2015-07-31
Rated 5 out of 5 by from Efficient In general I find the traditional cylindrical dry bags annoying because they aren't space efficient in a backpack. Osprey has solved the problem here making their bags with a box shape. These fit much better in a pack and are just as durable as anything else I've used. I use the 12L for food, and the 6L for clothes. The loop on the bottom is redundant since they already come with a D ring, but it doesn't hurt anything. I use a pack liner already, but I'd take the weight penalty to have these just for the peace of mind knowing my stuff is dry and safe.
Date published: 2016-09-22
Rated 5 out of 5 by from Food Storage Hang Bag Purchased this to store my food on a backpacking hike. I slipped in the creek and my backpack was temporarily in the creek. When I removed the Osprey Dry Sack, my food was dry. Love this bag.
Date published: 2017-03-26
Rated 5 out of 5 by from Happy Just bought this yesterday. Husband bought a more expensive brand. I thought I made a mistake as I want it for my food. Started to storm out so I put napkins inn it and hung it on my deck in the rain. Few hours later brought it in, napkins were dry. Quite pleased. Highly recommend.
Date published: 2017-03-29
Rated 4 out of 5 by from Great when new - punctures easy After a year of light use on the Osprey UL Dry bag (40 denier ripstop @ REI) I found several very small holes that allowed liquid to weep out. The test was as follows: turn bag inside out, put any amount of water, hang in the shower and monitor for leaks. The holes were too small to see with the eye and there was NO hissing sound or air bubbles when submerged and compressed. About 15 or 20 in all. Enough holes to conclude that in worse case scenario of your pack somehow getting water inside, the water would eventually wick its way into items inside the supposedly dry sack. I have several of them and tested all to find only 1 does not leak at all. Now I have to figure out how to patch or spend more $$ on replacement. I still rate this high and would recommend only if you're really careful on where you place it. It is super light weight (awesome). Just be prepared to test it out and spend more money if needed.
Date published: 2017-01-18
Rated 4 out of 5 by from Better than lg stuff sack I bought this right before a trip and used it as a pack liner. It has worked great so far with the box shape.
Date published: 2017-03-15
Rated 5 out of 5 by from Used for the Narrows in Zion, Utah Was so happy with this purchase. Was able to trek the Narrows with little fear of my personal items getting wet!
Date published: 2016-09-19
Rated 1 out of 5 by from Cheap and fragile. I used this bag to hang food on a week long trip. The construction is terrible. I put a hole in the sack IN MY PACK. The clasp is flimsy plastic as is the look to attach it with. I would not trust the thing to hold anything more than a pound or two. The top is flimsy and it leaked because it has a weird edge to it that prohibited the folds from sealing. My friend used the REI version and it held up WAY better and was a much better price. So far I am 0 for 3 on Osprey products. This one went right back to REI.
Date published: 2015-08-30
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Questions & Answers

can it be fully submerged?

Asked by: maika
The Ultralight Dry Sack cannot be fully submerged.
Answered by: REIservice
Date published: 2017-09-03

Is this durable enough to be used as a bear bag?

Asked by: AnnieB
No, we would not recommend this dry sack to protect food from bears.
Answered by: REIservice
Date published: 2017-08-10

Would this be good to put wet clothes in while traveling? I realize it keeps water from getting in well, but what about water out?

Asked by: andrew
​If the clothes are damp (wrung out) and not soaking wet, this should suffice.
Answered by: REIservice
Date published: 2017-05-30

Is the pack liner washable?

Asked by: gmalittle
We recommend washing this dry sack by hand using Nikwax Tech Wash.
Answered by: REIservice
Date published: 2017-10-16
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