The Outdoor Research Alpine Bivy is great when you want to go backpacking and keep things lightweight. This poled bivy weighs only 2 pounds and packs small. A single pole can be used to create overhead space, or it can be left at the trailhead.
What is good about this bivy
Waterproof Gore Tex fabric – The shell material on the Alpine Bivy is a special durable and waterproof Gore Tex fabric specifically created for bivy sleep systems. This fabric optimizes weather protection while creating a vapor-permeable layer that won’t collect condensation like other weather resistant bivy systems.
Design – the single overhead shockcorded Delrin pole keeps the bivy up and off of your face when the sack is closed while a wide storm flap shields the zipper from wind and rain. A deep taffeta floor easily accommodates thicker insulated mats like the Exped Downmat 7. There are loops and stakes to keep the bivy anchored.
Size – the bivy is 84 inches long while the high-volume foot area gives you plenty of legroom, although some find there’s also space to keep a few water bottles from freezing overnight. If the dimensions seem a little cramped and you need the extra legroom, you can consider opting for the larger Outdoor Research Advanced Bivy.
Lightweight – and all of this in incredibly lightweight, two pound package which only takes up 4 x 15.5 inches in your pack. You will hardly even notice it.
Pockets – inside the bivy sack you will find a small internal mesh pocket for your watch, flashlight or a paperback book.
Outdoor Research Alpine Bivy Features
- 4 Season waterproof bivy sack
- Made of highly breathable GORE-TEX fabric to keep you dry
- Durable Hydroseal coated floor
- Anti-fungal coating on floor
- Fully taped seams
- Single, shock-corded overhead Delrin pole
- No-see-um netting at opening
- Sleeping pad straps
- Sized to fit thicker mats
- High-volume toe-end
- Five stake loops; one guy-line loops
- Small internal mesh pocket
- Stuff sack
- Weighs 2 pound (0.91 kg)
- Pack size of 4” x 15.5”
What customers say about the Outdoor Research Alpine Bivy
There were only positive reviews for this bivy sack. Several reviewers mentioned that you should test it out prior to a major trip as this is not for everyone, especially if you are claustrophobic. A reviewer remarked, “I was able to read a book with my headlamp inside the bivy, with the proper head support (from extra clothes). This surprised me because when I first got in it felt small, but once you are laying down, there is enough room to read a book with.”
Reviewers agree this also extremely weather proof. One backpacker used it on a cold night, about 30 degrees, with slight dew. Another hiker “to test out condensation, I zipped the rain cover to about 2/3 shut, and left the remainder open. There is a semi-stiff material that helps keep the top zipper part slightly separated from the lower zipper so the venting is effective.”
Several reviewers mentioned it packs up nice and small. And to pack up you remove stakes, slide short pole out and collapse it, then give the bivy a trifold and roll it up. Although advertised as weighing 2 pounds, one reviewer said his was lighter at 1.8 pounds.
This reviewer added that by adding loops for it to be staked out OR has made sure that as you move in the night the bag stays right side up, and does not shift on the ground.
There were no issues with this bivy however several people mentioned they would have liked a full length zipper.
The Outdoor Research Alpine Bivy offers a lightweight and waterproof sleeping option when backpacking.