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This stuff sack combines the protection of a dry sack with the space-saving convenience of a compression sack. Tough, waterproof nylon stands up to extended use in harsh conditions. Fully taped seams give you complete water protection. An internal cinch closure lets you compress your load before you seal the roll-top.
| Dimensions – Rolled | Volume | Avg. Weight | ||||
| in. | cm | cu. in. | liters | oz. | g | |
| #1 | 20 1/2 x 7 | 52 x 18 | 610 | 10 | 8.1 | 228 |
| #2 | 23 x 8 | 58 x 20 | 915 | 15 | 8.3 | 234 |
| #3 | 25 1/2 x 9 | 65 x 23 | 1526 | 25 | 9.2 | 259 |
| #4 | 28 x 10 | 71 x 25 | 1831 | 30 | 10.2 | 289 |
| #5 | 30 1/2 x 11 | 77 x 28 | ? | ? | 11.4 | 323 |
The Hydroseal DryComp Sack from Outdoor Research will reduce the bulk of sleeping bags and clothing to their absolute minimum - and keep them absolutely dry with the Hydroseal coated nylon and external roll-top closure.

Head into wet, rugged environments with this durable, waterproof compression sack. Hydroseal coated Antron nylon fabric is fully seam taped for totally waterproof protection. The internal drawcord closure cinches around your load and four straps compress it all down. A sturdy buckle secures the roll-top closure, providing waterproof protection. An internal zippered pocket holds keys, a headlamp, or other small items and can be used to store the entire sack. A webbing handle and an external daisy chain allow this sack to attach to any pack. Outdoor Research
Compression sacks are cool, and dry bags are okay, but compression dry bags like the Outdoor Research Hydroseal Drycomp Sack are where it’s really at. This combo sack gives you the best of both worlds for paddling trips or backpacking in wet, rugged conditions. The roll-top closure and coated nylon fabric keep your clothes, food, and other gear dry, while the side compression straps and daisy chain let you compress and lash it down.

A band of air permeable fabric makes this the easiest to use dry compression sack available.
| Capacity: | 1058 cu in (Size 1); 1508 cu in (Size 2); 2068 cu in (Size 3); 2749 cu in (Size 4); 3564 cu in (Size 5) |
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| Dimensions: | [#1] 27.5 x 7in (70 x 18cm); [#2] 30 x 8in (76 x 20cm); [#3] 32.5 x 9in (82.5 x 23cm); [#4] 35 x 10in (89 x 25cm); [#5] 37.5 x 11in (95 x 28cm) |
| Manufacturer Warranty: | Lifetime |
| Material: | Coated nylon |
| Recommended Use: | Backpacking, paddling, camping |
| Volume: | [#1] 707cu in (12L); [#2] 1021cu in (17L); [#3] 1418cu in (23L); [#4] 1905cu in (31L); [#5] 2493cu in (41L) |
| Weight: | 7.7 ounces (Size 1); 8.5 ounces (Size 2); 10 ounces (Size 3); 10.6 ounces (Size 4); 11.4 ounces (Size 5) |
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View other products from Outdoor Research classified in Hiking & Camping > Stuff Sacks. View all products from Outdoor Research.
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Sometimes, we can't be sure that the product is the same across the stores that offer its, so you may find the same product listed more then once on GearBuyer.com, we these list highly similar products below.
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Great Product | |
| Rating: | ![]() |
| I am going to use this as my sleeping bag and clothes bag on backcountry and mountaineering trips. When I got it, I tested it by submersing it in water and then letting it sit for 4 hours. There were no leaks in the material and the only water that got in was when I forced air out while it was under water. But even then, the water didn't make it past the inner drawstring, my clothes inside weren't even damp. It's also very buoyant. My only complaint is the drawstring is a little hard to close tight (may be the price you have to pay for waterproof material). | |
| Vorler at Mountain Gear on 08/09/2008 | |
Pretty solid dry sack | |
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I picked up the biggest version of this sack on S&C before a recent 5-day rafting/camping trip. It kept all my clothes snug and dry even though we spent a good portion of the float in a torrential downpour. It also seems very rugged compared to other dry bags I've used. It is kind of hard to find what you're looking for as the sack is a bit narrow. I also didn't find that the compression straps added much, but my clothes were pretty compressed to begin with. I may buy more of these in different sizes. | |
| Kettel at Backcountry.com Outlet on 06/24/2009 | |
A good addition to my dry bag collection. | |
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I loved the ultra small size of these bags when they're packed into their own pocket. They were a great size for packing clothes only and the compression helped a bit. The two colors helped keep track of different clothes at a glance. I used this in a canoe this time so didn't give it a real wetting but it repelled the splash with no wet spots. Well worth the money on SteepnCheap | |
| roscoe918 at Backcountry.com Outlet on 09/08/2009 | |
sack | |
| Rating: | ![]() |
This sack does the job. It keeps your stuff dry. It compresses. It's tough. I don't know what else you would ask of stuff sack? For the reviewers having problems with the compression piece: 1)Pull the draw string and put your hand on top of the bag. 2)Compress 3)Seal airtight top. The key is to compress before sealing. I thought this might have been obvious but.... | |
| Anonymous at Backcountry.com Outlet on 08/24/2009 | |
It really brings the sleeping bag down. | |
| Rating: | ![]() |
| Easy to move the sleeping bag around the country when it stores so easy in the travel comp bag. | |
| Mr. D at Mountain Gear on 10/30/2008 | |
Neat little stuff sack for the wet. | |
| Rating: | ![]() |
| Rugged construction, typical OR fit and finish. | |
| JasonG at Mountain Gear on 01/02/2007 | |
deceiving picture/discription | |
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Q: Why do you buy a compression sack? A: So it compresses everything to fit in a smaller space. PROBLEM: The compression straps are only half the length of the bag so when you try to compress it basically your just filling the non-compression half of the sack with gear that should be compressed. A major design flaw, no wonder it was on Steep and Cheap, but it's going back. | |
| Jared Fuchs at Backcountry.com Outlet on 08/20/2009 | |
compression? | |
| Rating: | ![]() |
There lies a fundamental problem with an airtight compression sack... after you fill it with your gear and wrap it closed there's air trapped inside the sack so when you tighten the side straps it doesn't really compress the sack volume because the air can't escape. It's fine as a drybag though. | |
| MASH at Backcountry.com Outlet on 08/13/2009 | |
Hard to stuff sack | |
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| packing gear for a long range motorcycle trip...would have been helpful to know exactly how much could be crammed in this stuff sack e.g. two lightweight sweaters | |
| Ryno the Vagabond at Mountain Gear on 10/29/2007 | |