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  • 3-layer Gore-Tex® Respiration Positive fabric provides waterproof, windproof protection; all seams are taped to ensure waterproofness
  • Waterproof Hydroseal® coated nylon floor for extra durability; end-opening zipper is protected by a wide storm flap
  • Single overhead shockcorded Delrin® pole keeps bivy up and off of face when sack is closed; wide storm flap shields the zipper from wind and rain
  • No-see-um-mesh at opening keeps bugs off face while allowing ample ventilation; height is approximately 20 in.
  • Footprint is sized to accommodate thicker sleeping pads
  • Straps keep your sleeping pad in place, preventing the bivy from rolling over during sleep
  • High-volume foot section allows a more natural position for feet and is approximatey 14.5 in high
  • Small internal mesh pocket
  • 5 stake loops and1 guyline loop
  • Includes Delrin pole and stuff sack
  • Shoulder girth is 52 in.


View all Outdoor Research Bivy Sacks

REI membership


Best Use Backpacking
Seasons 4-season
Sleeping Capacity 1-person
Weight 2 pounds
Packed Size 4 x 15.5 inches
Bivy Length 84 inches
Shoulder Width 26 inches
Rated 5 out of 5 by from So much better than a tent This thing is amazing. If you've slept in a traditional one-person backpacking tent, this is going to be very similar so long as you consider one fine point: Others have mentioned the poor hood design - YOU NEED TO USE TENT STAKES. Seriously, doing so will allow you to keep everything taut so that lip/edge of the hood can be rolled over the pole such that it will stay put (this should make sense...) If you're really concerned beyond that, you can use a clip to hold it in place. But, I can't stress enough the importance of tent stakes. Yes, something that should probably come with the bivy sac, but an easy fix - fyi - get the MSR's.
Date published: 2011-05-02
Rated 4 out of 5 by from warm as toast i'm 5'5 120 lb female, i used this bivy in 22 degree temps with my marmot zero degree lithium down bag, a thermarest prolite 4 pad, a northface 800 fill down jacket and a warm hat. slept toasty warm, but mild condensation at foot of bag made me a bit concerned as to what would happen in colder temps. a small zipper at the foot of the bag might take care of this problem, but maybe OR is concerned about waterproofness. might add a footprint as recommended by other reviewers to step on when getting in and out of the bag. overall very happy and will probably replace my msr hubba tent to cut down on weight.
Date published: 2010-12-11
Rated 5 out of 5 by from amazing but can get wet this has to be the best bivy iv ever used. most of my hiking is down in the winter and living in New England there's a lot of steeps and heavy tree coverage so for me a tent just doesn't work. every time i have used this i stayed super comfortable and dry. iv been out in a hurricane with tons of rain and it held up like a champ. my only downfall is i recently got a dog and when sleeping out in 0 deg weather so of course the little one decided to cuddle in with me so after the two of us in there the amount of condensation was outrageous how wet my sleeping bag got oh and don't sit up to fast if it really cold out cause sometimes you'll get icicles
Date published: 2011-01-30
Rated 5 out of 5 by from Excellent bivy for cold trips After searching long and hard I choose the OR alpine bivy for its ruggedness and its extra head room. This is a fully sealed gore tex bivy with a little head extra room. When comparing to most bivys this is pretty light weight at 30oz by my scale and has an extremely fast setup time. Just one plastic tent pole. I have used this on many trips in Moab deserts to the Rocky Mountains and just be aware being gortex it does not breath very well, so if its warm you will be sweating if you dont keep the flap open. It is also difficult to get in and out of since it has no side zipper but thats the compromise for a water proof yet light weight bivy. I would say its one the best bivys I have tried yet.
Date published: 2015-08-04
Rated 5 out of 5 by from Just what I need I'd rather sleep under the stars than in a 5 star. For years I've traveled with a pad and a 10'x10' nylon tarp. I finally broke down and got this to replace the tarp. Just finished a 3 day trip and it works fantastic. I did not get to test in in wet conditions. It was dry and cold where I camped and there was zero condensation in the sack each morning. I did not need the netting or cover over my face as the bugs all go to bed before I do. I love to look at the stars/moon between short sleep periods all night long. Based on how it worked I can imagine it is exactly what I've been looking for. Very pleased.
Date published: 2011-09-12
Rated 5 out of 5 by from Smallest Packed Shelter I Own I bought this a couple months back for use as a small solo shelter for myself. I didn't want to take up much space on the ground and I didn't want to have to worry about guylines sticking out. Basically I want to hike or run all day and then lay down wherever I end up and go to sleep. This isn't the lightest shelter option ever, but it packs down a whole lot smaller than my cuben fiber tarptent. It's just slightly larger than a 48oz nalgene bottle. When I'm trying to keep my load small and close to my body that really helps.
Date published: 2014-05-24
Rated 4 out of 5 by from Good with some person adjustments Overall good bivy. I slept in this bivy so far two nights. I'm a smaller person so there was plenty of room for me without feeling too enclosed in. The bivy sack kept me warm and was super fast to set up. The only thing I wish OR added to the bivy was a way to hold the flap up when you want to have fresh air with the no see um mesh. I added a tarp loop attachment and used a beener to hold it open and everything was really nice afterwards. I can see the stars and sleep comfortably.
Date published: 2014-09-19
Rated 5 out of 5 by from Perfect! Humphrey's AZ in the winter- very warm and cozy. Yosemite in early spring with rain- warm, dry and cozy. I don't mind close quarters and this bivy is just about perfect. One pole, packs relatively small, Gore-tex dry, though I did get a small amount of condensation that froze on the wall. There is enough room to move around a little and I spent some time inside and read a book in the rain. I think it is fantastic!
Date published: 2008-12-04
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I am going to be in extremely wet conditions (Kaua'i, Hawaii). Will this keep me dry? The ad says the bottom is waterproof, but what about the top?

Asked by: mlpmoon
The top of the Alpine Bivy is made with a waterproof Gore-Tex fabric. The entire bivy is made of waterproof material to keep you dry.
Answered by: REIservice
Date published: 2016-12-26

How do you set up to look like picture? Do you need tent stakes and taught lines?

Asked by: SteveN
The bivy will look the picture when zipped closed.
Answered by: REIservice
Date published: 2017-05-11

I'm interested in buying this bivy but I am 6 foot 6 inches tall and not sure if I will fit inside it. Will this item meet my size requirements ?

Asked by: JustinZ
The Outdoor Research Alpine Bivy is 84 inches long. 84 inches is exactly 7 feet. This bivy will work for you, but there will only be 6 extra inches to move around in.
Answered by: REIservice
Date published: 2017-05-01

Would you recommend a ground cloth/foot print for this bivy?

Asked by: Retronerd
We do not offer a footprint to go along with this bivy, but you can cut down a lightweight tarp to work as a footprint if needed.
Answered by: REIservice
Date published: 2017-06-02

So I just bought this bivy..... i am urious about care and cleaning... and i cant find anything on the topic.... machine wash? does it need treated\sprayed with anything? I'M LOST.....

Asked by: Uniroyboy
The Alpine Bivy should never be put in the washing machine. The agitator will more than likely destroy the ripstop nylon. We would recommend hand washing the bivy by hand in the bathtub with Nikwax Tech Wash. Tech wash is safe on Gore-Tex and will revive the breathability of the bivy. You can then apply Nikwax TX-Direct Spray-On Water Repellent Treatment after washing. The TX-Direct will add water repellency without affecting the breathability and is perfect for bivys.
Answered by: REIservice
Date published: 2017-05-01

I have lost my Outdoor Research bivy poles.  Any idea where I can get replacements?

Asked by: mel34
We suggest contacting Outdoor Research.
Answered by: REIservice
Date published: 2017-04-12

Any experience with placing an OR bivy on a roll-a-cot? Considering its use on rafting trips, where 90% time a cot alone is sufficient..but an occasion cloud burst, or a mosquito thicket warrants protection like a comfortable bivy.

Asked by: JCreek
This bivy can be used in combination with a cot for extra comfort. It would provide the comfort of a cot and the protection of a bivy in inclement weather.
Answered by: REIservice
Date published: 2017-05-01

Does anyone know if there is a designed way to keep the screen open? Maybe I'm just missing something but I am about to just rig something myself.

Asked by: Trampster
Yes, the mesh screen on the Alpine Bivy can be left open. You simply unzip the mesh and store it behind your head (which is where the mesh is attached to the bivy).
Answered by: REIservice
Date published: 2017-06-17
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