Outdoor Research Advanced Bivy

Priced: $319.00 - $320.00 Rated:   - 5 stars out of 5 by 26 reviews.
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Outdoor Research Advanced Bivy -
Outdoor Research Advanced Bivy Features.

Outdoor Research Advanced Bivy.
The Outdoor Research Advanced Bivy is an ideal choice for your outdoor camping adventures. It's made from 3-Layer Gore-Tex Respiration Positive laminate fabric that is vapor-and gas-permeable for a cool, ventilated night's sleep. The two shockcorded Delrin poles give you many versatile open positions from wide open to awning style. A Hydroseal coated nylon floor is durable, waterproof, and comes with fully taped seams to further make sure protection from the water. An end-opening zipper with a wide storm flap lets you get in and out of this bivy without compromising on weather resistance. There are five stake and three guyline loops provided for secure anchor points to keep your bivy firmly in its place. The Outdoor Research Advanced Bivy serves you well on your camping trips in the wilderness.

Key Features.

Lining and Layers:

  • Three guy line loops


  • Sized to fit thicker mats like the Exped DownMat 7
  • Footprint is sized to fit thick sleeping pads for increased comfort


  • 100% nylon floor, pole tunnels, stuff sack
  • Removable, tightly woven no-see-um mesh provides lightweight, chemical-free bug protection that doesn't interfere with visibility; height is 20 in.
  • 3-layer Gore-Tex® Respiration Positive™ laminate fabric was created just for sleep systems—it's both vapor- and gas-permeable
  • Highly-breathable Gore-Tex fabric body


  • Sleeping pad straps (pat. #5,941,264)
  • Straps keep your sleeping pad in place, preventing the bivy from rolling over during sleep


  • High-volume foot section with zippered vent allows sleeping bag to maintain full loft for optimal warmth around feet; height is 14.5 in.

Weather and Wind:

  • Durable and waterproof Hydroseal® coated nylon floor; fully taped seams ensure waterproof protection
  • End-opening zipper with a wide storm flap allows easy entry and exit without sacrificing waterproofness


  • Small mesh pocket holds nighttime essentials


  • Removable no-see-um netting covers opening
  • Includes Delrin poles and stuff sack
  • Shoulder girth is 52 in.
  • 2 shockcorded Delrin® poles allow the bivy to open in several different positions from wide open to awning style
  • Pole system allows multiple configurations for opening
  • 5 stake loops and 3 guyline loops provide ample anchor points
  • Anti-fungal coating on floor
  • Two shock-corded Delrin poles, overhead and circumferential (Dual Delrin pole system pat. #4,458,145)

The Outdoor Research Advanced Bivy. Light, compact, and quick to set up, bivy sacks offer all-weather protection for solo travelers and those going beyond the well-beaten path.

FEATURES of the Outdoor Research Advanced Bivy.
SPECIFICATIONS of the Outdoor Research Advanced Bivy.

Take a break from the storm in the Outdoor Research Advanced Bivy, a lightweight option for solo backpackers and peak baggers. The innovative two-pole design creates an adjustable awning. This adjustability allows you to modify the angle of the overhead roof, and thus the size of the zipper opening, to match your environmental conditions. Rain or snow runs down the roof off this waterproof, windproof bivy's wide storm flap and onto the ground. When wind kicks up, reduce the zipper opening to prevent moisture from blowing in. When skies are clear, open to stargazing mode with the removable no-see-um netting in place to keep bugs out. Extra room under the awning creates a great place to store your boots. Straps secure your sleeping pad to the bivy interior so you don't have to deal with your pad sliding around. A small internal mesh pocket stores objects like headlamp or lip balm. This Outdoor Research bivy also has six guy-line loops so you can tie it down in extreme wind.


The spacious Advanced Bivy™ from Outdoor Research can be used in place of a single tent. It is larger than the Alpine Bivy™, with more space for thicker sleeping pads and loftier bags. The patented dual-pole system can be used for increased ventilation and interior space, or left behind when weight and pack space are critical. The GORE-TEX® Respiration Positive™ fabric allows warm moist air to escape to avoid condensation while providing supreme weather protection. A zippered vent at the base improves airflow on humid nights.


The Outdoor Research Advanced bivy sack offers full-on weather protection and has a commodious design featuring a generous footprint for those who prefer a little more wiggle room .


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Average Price History: Price History
Review RatingNumber of Reviews
Avg. weight with out pole:34.0 oz.
Best Use:Backpacking
Bivy length:87 inches
Body Material:100% Nylon, 3-Layer GORE-TEX Respiration Positive Filament Ripstop Fabric, 100% Nylon Floor, Pole Tunnels, Stuff Sack
Design type:Poled bivy
Floor Material:100% Nylon Floor
Floor Space:15 sq ft / 1.4 sq m
Head Height:20 in / 50 cm
Length:87 in.
Max Inside Length:87 in / 221 cm
Max Inside Width:26 in / 66 cm
Packed Size:23 x 8 in / 58 x 20 cm
Peak Height:20 in.
Pole Material:Delrin
Rainfly Material:3-Layer Gore-Tex Respiration Positive Fabric
Seam Taped:Yes
Shoulder Girth:26 in
Shoulder width:26 inches
Sleep Capacity:1 Person
Sleeping capacity:1-person
Stuffed Size:15.25 x 4 x 4 in
Upc, Ean, Isbn:727602035000
Vents:Foot Vent
Weight:With Pole - 39 oz
Weight - metric:1.11 kilograms
Weight with Pole:39.0 oz / 1106 g
Width at Feet:19 in.
Width at Shoulders:26 in.
Compare specifications to related products.

Subcategories of Tents & Shelters:

Outdoor Research Advanced Bivy Reviews:

Positive Reviews:

Good choice for soloing

I used this bivvy as a primary shelter for several weeks in South America, including both high-altitude camping and lowland camping. Overall I really liked it, and would use it again without hesitation, but there are some things to be aware of.

The most frustrating thing for me is the pole design. The bivvy comes with two poles, and five end pieces (two per pole with one extra). The end pieces have snaps on them, which is how the poles are attached to the bivvy. The problem is once you snap the poles into place, if you move around at all, the poles come out of the snap pieces, and the hood collapses. I'm not sure why the snap ends aren't just permanently attached to the poles. I tried it out, and the snaps easily slide through the material into place. So I think I might just glue the snap ends onto the poles and make it permanent. That way I can't lose the snaps, and they won't come unattached while I sleep.

Another potential problem is that the screen gets snagged in the zipper very easily. I'm not sure how to improve on this, but it was very frustrating when, on the first night I spent in the bivvy, I snagged the screen in the zipper, resulting in a 1-inch tear in the mesh.

Condensation was definitely an issue, but I'm pretty sure that's always an issue. I didn't have any pooling, but the entire inside of the bivvy became wet every night. It wasn't enough to soak through my sleeping bag, and it didn't adversely effect me at all, but it was something to be aware of. Every morning I would empty out the bivvy and let it dry out.

One other issue to be aware of is that for people who are on the large size like me (5'11", 220 lbs) there isn't a whole lot of wiggle room. It's big enough for me to get into and lay comfortably, but if I lay on my side, my shoulder is against the roof of the bivvy. So a person much larger than me would definitely be tight.

Also, one other small issue. The stuff sack that comes with the bivvy is exactly the right size, so there is no room for error, it has to pack very tightly into the stuff sack. Which means stiff fingers on a cold morning will probably have a hard time getting everything back into the sack. I just used a slightly larger stuff sack and it was fine.

Those are all complaints, but I don't want to make it sound like I dislike the product. I still like it, and look forward to using it on all of my future solo trips. The material is very durable and lightweight. It sets up quickly and easily. It kept me warm. There was plenty of room for my large (77" x 25") rectangular sleeping pad. It's definitely a cool little solo shelter.

Oh, also the product image shows the hood arranged in several positions. That is slightly misleading, as there is no way to keep the hood partially open. Gravity pulls it back down. You can open it all the way open, or let it rest in the closed position. It won't stay 30% or 50% open unless you rig up some way to hold it open.
JCN at REI on 11/11/2009

Great product - nearly perfect

I do virtually all of my backpacking in the Sierra and purchased this bivy 14 years ago in order to lighten my load on long trips. It was one of the best gear decisions I have ever made. Originally, I viewed it as an "emergency shelter" to use only in inclement weather. However, I now use it every night. As a sleeping bag shell, it adds warmth to my bag, and any dew that falls ends up on the bivy (which dries quickly once the sun comes up), rather than on my down bag (which is slower to dry).

As a shelter from the elements, this bivy is rock solid. I have endured several nights of heavy rain and stayed bone dry with virtually no condensation. On one trip, four inches of snow fell on me overnight in the bivy and temperatures dropped into the teens. Again, I remained warm and dry inside. On that occasion, a small amount of condensation did occur in the hood area from my breath, but that was due to the fact that I had to zip the bivy completely closed to keep snow from blowing laterally into the bivy. Fortunately, it was cold enough that the condensation froze on the hood, so I remained quite dry and simply flaked the ice off in the morning.

My only complaint with the bivy (remember this is the 1999 version) is that the hood design is not quite perfect. There are nights when I use the bivy for mosquito protection. In its natural configuration, when the bivy is unzipped and the mosquito net deployed, the bivy is not open enough to allow as much circulation as I would like. I get around this by tying the bivy poles in a more open position using a cord threaded through some loops that are provided. It is workable, but not ideal.

The bivy does have a finite lifetime. After 14 years of use, the floor in the head area has developed some tiny holes that, during a recent heavy downpour, did allow water to seep through the bottom. That was mostly my fault, as I chose to sleep in a slight depression on a slab of granite (there were no clouds when I went to sleep...the storm came up suddenly in the middle of the night), and I was literally sleeping in a puddle. For that reason, I have retired the bivy and ordered a new "OR advanced bivy." I did notice that the specs on the new model indicate it weighs 2 lbs 7 oz, and so is a little heavier than my 1999 model, which weighed slightly under 2 lbs. I am curious to see if the added weght has to do with a change in floor materials.

All in all, I highly recommend this product. Indeed three friends have all purchased this bivy based on my recommendations, and all are happy with the outcome.
SierraHkr at REI on 04/04/2013

I love it

I love this bivy. I used it throughout 5 years in the army (and 4 since I got out) in the field (no pup tents these days, they issue bivy bags that are okay, a lot of guys buy their own if their units allow using non standard stuff.) I have used it all over the east coast, Sierras, Rockies, Afghanistan, Nepal, and many other places and really love it.
What surprises me is that after so many years of using the 2000 version, it still looks pretty new, thats after probably 1000 nights in it. Granted I take really good care of it but seriously, it should be worn out by now.
I have used a lot of Outdoor Research gear over the years and I have found that the stuff may not be the most advertised gear on the market, but if you base value on durability and quality they cannot be beat. They redirect what they would spend on marketing towards the product R&D, the product price, and quality control and as a buyer you get more for your money.
I am not connected to the company in any way, just a long time satisfied customer.
This bag rocks, but the one drawback is condensation and lack of ventilation. You have to leave the zipper an inch or two open to get good ventilation when you have the bag otherwise all sealed up in bad weather. You won't get any leaks thanks to a good storm flap, and no creepy crawleys will get in since you have a bug net, but I do like feeling all sealed in.
I am a big fan of bivy bags and have looked at everything on the market, and for the things I like (durability, weatherproofness, durability, lightness, durability, ease of setting up, and again, durability) this is the best I have seen. There are a few (Integral Designs and Black Diamond) that have some interesting bivys but they are more like tents than bivys.
If you like using bivys, in my opinion this is the best you can get.
BDCrowley at REI on 12/12/2009

very good, but not quite perfect

I use this in conjunction with an ultralight tarp- the tarp preferably being
shared by a group to save weight. It is pretty darned good but has a
few flaws (that said, it still the best I've found).
The upper bug net zipper needs a 2 sided pull. If I'm at a base camp mostly under a group tarp I like to leave the hood open unless it's monsoon season while I go off working. Opening and closing the bug net with a zipper that only has a pull on the inside is annoying if you are on the outside. The pole system
needs a bit of explanation. In hot/dry weather and/or under a tarp leave off the pole by your feet and attach a new grommet to the area by the center of the pole area closest to your head so you can tie the system FULLY open
with a rope and 2 stakes (V formation). The original grommets by the pole closest to your feet just don't cut it in 80+ degree weather. The lower pole jambs into your body and the bug net/hood is not fully open (there were no grommets on the upper pole on my bivvy as it was sold). In
cold/very wet weather use the pole closest to your feet and leave out the one by your head and just let it flop or seal it- makes sealing the setup in really lousy conditions easier and still keeps the fabric off your face. Trying to use both poles is an exercise in frustration. It also works great with groups in
hot weather- just bring a shared tarp and lighter
sleeping bag. +45 works to +35 for me if I seal the hood- you will appreciate the extra grommet/rope and 2 stakes in even warmer weather.
At 2.1 lbs and a shared tarp this is a joy to use
if you take the time to learn to use a bivvy sack in a range of conditions. The GoreTex top and bathtub base has performed quite well.
cosmo2 at REI on 09/09/2011

I've had good luck with this sack. Actually, I have the old version that is more of a royal blue color. Pretty much the same setup though. Throughout its career, my sack has been through many drizzle type conditions and a couple all out deluges (one was an AZ monsoonal storm). I've stayed dry with them all.
A couple of times I have had the condensation issue it seems all bivys are plagued with. I found I only use the bivy when I absolutely need it and keep the venting as open as possible to eliminate the condensation. If it's a clear night but I'm expecting dew in the morning, I'll sleep under a tree and leave the bivy packed.
Fours stars due to the poles. Yes, they work ok, but they're a bit slow during setup. I'm not super stoked with the snaps, but again, they do work. I do find having the sack off your face is a benefit however.
I haven't bought a newer version because mine has held up just fine over the years and still running strong.

swagbrdr at Backcountry.com on 10/28/2013

Lifetime Investment

I sleep outside 365 days a year, and half the year in some pretty rugged conditions. Let me tell you this bivvy was the greatest investment in gear I have ever made. I have slept in it 600-700 nights since buying it in every situation from Florida to Alaska. After going through many bivvys, this one has the least problems with condensation. The quality put into outdoor research products is astounding. The zippers have worked flawlessly the entire time, and the floor has never developed holes. However, after abusing it for almost 3 years, the fabric has begun to absorb and leak water.

I called outdoor research asking to buy fabric to repair mine, and they SENT ME A BRAND NEW advanced bivy free of charge! That's right: anything you buy from them is guaranteed for LIFE. No joke. This is a company that really cares about brand loyalty. From now on when given the option I will only be buying outdoor research stuff.
thewindnrain at REI on 10/10/2013

Why does buying a bivy seem like such a hassle? So I bought this one and I tried it one night. I woke up hot, stuffy and panting. Let's call it 'freak out mode'. This thing may be bomber and all, but it really isn't for me. I wanted a bivy for sea kayaking when there isn't a good place to put up a hammock. The only way I could see using this thing and not freaking out in the middle of the night is if the wind was blowing and you could get consistent fresh air. I think I will just use it under my MSR Zing wing, having that extra level of protection from the elements and using the bug screen to keep the mosquitos at bay. The only negative I found with the actual bivy was the fact it isn't high enough when I sleep on my side. the top pole was against my shoulder the whole night making rolling over a hassle.

greg at Backcountry.com on 01/11/2013

I sleep outside 365 days a year, and half the year in some pretty rugged conditions. Let me tell you this bivvy was the greatest investment in gear I have ever made. I have slept in it 600-700 nights since buying it in every situation from Florida to Alaska. After going through many bivvys, this one has the least problems with condensation. The quality put into outdoor research products is astounding. The zippers have worked flawlessly the entire time, and the floor has never developed holes. However, after abusing it for almost 3 years, the fabric has begun to absorb and leak water.
I called outdoor research asking to buy fabric to repair mine, and they SENT ME A BRAND NEW advanced bivy free of charge! That's right: anything you buy from them is guaranteed for LIFE. No joke. This is a company that really cares about brand loyalty. From now on when given the option I will only be buying outdoor research stuff.

at Backcountry.com on 10/31/2013

Great for serious backpackers

I have used this Bivy in the snow, in the summer, and all climates between. I have had nothing but good experience with it, and I would recomend it to anyone. Levels of condinsation that I have experienced have varied from moderate, to none. I have seen reviews that complain about the moisture, but if you are a serious backpacker, you should be able to live with a little moisture from condensation. That means you were breathing, all through the night. at the maximum amount of moisture, it wasn't anywhere near enough to soak my sleeping bag. It was the same as would build on the inside of your tent. Bottom line, this is a great product, and it has changed the way I pack my bag, and has given me more space. I love that if we hike in and it is raining or snowing, I can throw this out, and be out of the elements in a minute or less.
Outdoor Jake at REI on 07/07/2012


I used the previous version of this product for aprox 8 years and it is just now showing signs of needing replacement. It has really been a great way to go for me. Added a layer of warmth and allowed me to carry light sleeping bag above treeline where I prowl, and made a great skeeter and ant free good night's sleep when down in the forest. Has kept the rain out and for me, breathes nicely and has never been too clammy even when warm out. Just throw the bag off part way and dream on. The poles do a nice job keeping the bug screen or flap off my face. It does however require a little patience to set up, but I really feel it worked well for me everytime I used it, and I can lay back and read comfortably or rollover and write in my journal.
Narrow Latitude at REI on 04/04/2008

Negative Reviews:


I found this bivy cumbersome to set up,the adjustable hood would not stay up and would fall closed in a slight wind. The zippers on the mesh were a pain. When sleeping on my side the upper pole was resting on my ribs. Not a product for me especially for the price!
The material seems very durable and I believe it would hold up for quite some time. Its just not for me so I returned it.
TrailTamer at REI on 10/10/2009

Some good times and some bad times.

Used this on a river tirp. Worked great as an alternative to just being under the stars.

Used for some high mountain backpacking and did not stay dry and warm. The bivy ended up filling with water every night from light rian storms and would take a long time to dry out when hung up inside out in the sun.

Still the best bivy I have ever had.
Born 2 Ride at REI on 06/06/2009

Neutral Reviews:

Sticky Icky after 20 years

I have used this many years all over the Eastern USA and in Belize for 6 Months.I have an earlier version of this and for some reason after about 15+ years the interior of it seems to be breaking down.Its sticky,very even and there is like a white sticky substance peeling off of the inside of it.Not sure why or whats causing it but it is getting to the point of replacement and i am not sure if i will choose this Bivy again due to that factor.Also i am not much of a fan of the front entrance and would like one with a side entrance.Bottom line i do love this bivy and i would continue to use it if not for the break down problem.Well built has made it through some rough times in Belize and here on the East Coast of the USA and never let me down.I just dont like the fact that all this white stuff is coming off and gets all over me my Sleeping Bag and anything else i bring into it.Mabye the newer design has addressed this issue, but for the price i dont want to find out it didnt.
SilentWolf333 at REI on 05/05/2012

OR Advanced Bivy

I do not want to be too critical of this equipment but there are two major problems from my perspective. First, the zipper does not close all the way unless one of the poles becomes disengaged. Once this happens, the height of the bivy is decreased 3-4 inches. Second, a considerable amount of condensation collects on the ceiling. Granted, I was camping in 0 degrees Fahrenheit (-18 C) but a film of ice would form on the entire ceiling which began to drop on my face and sleeping bag throughout the night. This happened with the bivy completely closed on one night and partially open on another night. The company claims this does not happen but they may be referring to higher temps. I have decided to return this product and purchase a one-person tent for this type of camping.
statsman4 at REI on 01/01/2014