Advanced Bivy™

Style# 40141OR

The spacious Advanced Bivy™ can be used in place of a single-person tent. The largest of our bivy sacks, the Advanced Bivy™ provides space for thicker sleeping pads and loftier bags. The waterproof GORE-TEX® Respiration Positive™ fabric is incredibly breathable and blocks rain and snow, and the patented, removable dual-pole system increases ventilation and interior space. A zippered vent at the base improves airflow on humid nights.


Mojo Blue




  • Pole System Allows Multiple Configurations for Opening
  • Small Internal Mesh Pocket
  • Five Stake Loops; Three Guy-Line Loops
  • Toe-End Zipper with Wide Storm Flap
  • High-Volume Toe-End with Zippered Vent
  • Sized to Fit Thicker Mats
  • Sleeping Pad Straps
  • Overhead and Circumferential Dual-Delrin-Pole System
  • Fully Taped Seams
  • Anti-Fungal Coating on Floor
  • Durable Hydroseal


Fabric GORE-TEX® Respiration Positive™ 3L, 100% ripstop nylon 30D body, 100% nylon 70D floor, 100% nylon pole tunnels, stuff sack

Avg. Weight (oz./g): 39.0oz / 1106g (One Size)

Customer Reviews

Advanced Bivy (Review by By No Name Here)

I have owned two of the Advanced Bivy. I don't recall what happened to the first, but this one, which I have cared for like my life depends on it, lost all of the seal coat on the floor at the beginning of an 18 day trip in the Smokies, leaving my down bag at the mercy of the elements. This critical failure could have been disastrous, if the weather hadn't turned mild for the last half of the trip. I will be looking for a new bivy without a more permanent floor material. Heck, this one is [$] more than it was last time I bought it. Yeesh.

(Posted on 3/24/11)

Advanced Bivy (Review by By Duke the kayaker)

I use this product for self support kayaking adventures. It is small enough to fit into tight spaces and quick and easy to assemble at the camp site. In summer I use a light weight sleeping bag inside and during my winter trips (0-30F) I use a 2 layer system down sleeping bag inside. I use 20"-24" wide sleeping matts inside based on wether I am truck camping or on an expedition.

(Posted on 1/14/11)

Advanced Bivy (Review by By J. Tim)

After ~20 years I finally got back on the trail (actually more bushwacking than trails) taking a solo foot excursion deep into the BWCA (northern MN). I'm not a big strong guy so I wanted to go light for a tent. This bivy worked out perfect. I went early before bug season but I could see where the netting would be handy later on using its full ventilation position. I can't opine on the performance in really wet weather but looking at the design and the use of gore tex; I'm sure it would do fine. It did fine with the light snow. I did have trouble keeping the bivy in the full ventilation position (it would close up on me) but that might have been operator error. I like the design where your sleeping pad is held in position by straps. I'm anxious to get out on my next solo trip with this bivy.

(Posted on 1/5/11)

Advanced Bivy (Review by By Wildhog)

This is about the perfect bivy for peak bagging excursions. It's light weight, but has more ventilation options than a simple bivy sack. The poles give adequate space and make things less claustrophobic. You can open it up for a warm night and the bug screen will protect you from mosquitoes. In colder whether there is another pole configuration which will keep it a bit more cozy.The only downside I can think of is the pole ends can be easy to lose if you don't carefully pack everything away.

(Posted on 12/14/10)

Advanced Bivy (Review by By sm10ca)

Great for ultra lightweight camping, snowshoeing & back-country ski trips. Ideal for late-afternoon or night search and rescue mission, or as emergency backup shelter.

(Posted on 12/9/10)

Advanced Bivy (Review by By Troutbum420)

Lived out of this bivy in 4 season scenarios, major storms and x-country cycle and hiking trips. Went through a few lesser prodcuts before I justified the extra expense; its worth it, bomproof and best on market

(Posted on 12/9/10)

Advanced Bivy (Review by By Tchips)

I use this bivy wherever I might be. It's waterproof which is perfect for my coastal kayaking. It's lightweight and small pack size is great for bike touring or weekend hikes. Gonna use it for some backcountry boarding soon which I know will be a lot warmer than my buddy who is sleeping under a tarp. This is a product I bring on every excursion I go on and is great for emergencies. The zipper can be better approved and maybe add a elastic to the poles so they aren't so easy to lose. I do wish it cam in a more neutral color for stelth camoing but it is the best bivy I have used thus far.

(Posted on 12/7/10)

Write Your Own Review