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Outdoor Research
Helium Bivy

4.25 out of 5 stars
40 Reviews
$224.95
Color:Pewter

Size:

Quantity

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Why We Like The Helium Bivy

Tipping the scales at just barely over a pound, the Helium Bivy is what we grab to move fast through alpine terrain and wilderness expanses without excess weight slowing us down. The Helium Bivy offers total waterproofing and maximum breathability with its Pertex Shield+ 2.5-layer membrane, TPU floor lamination, and fully taped construction. Ultimately, this means you stay pleasantly dry when you're camping out in widely variable conditions, all without soaking in a sauna during humid summer months.


Details

  • Ultralight bivy boasts phenomenal weather protection for backpacking
  • Pertex Shield + is reliably waterproof and comfortably breathable
  • Clamshell opening is easy to get in and provides plenty of space
  • Delrin single-pole system with two stake loops and one guy line loop
  • Internal straps for sleeping pads
  • Item #ODRZ8NC
Material
[membrane/laminate] Pertex Shield+ (2.5-layer), [upper] 30D nylon ripstop, [floor] 40D nylon with TPU lamination, [hood lining] no-see-um mesh
Poles
1
Pole Attachment
Delrin single-pole system
Ventilation
no-see-um mesh
Seams
fully sealed
Interior Height
19.5in
Floor Dimensions
26 x 87 x 20in
Floor Space
82 x 26 - 19in
Packed Size
12.25 x 3.5in
Trail Weight
15.8oz
Packed Weight
16.8oz
Activity
backpacking
Manufacturer Warranty
lifetime

What do you think about this product?

Overall Rating

4.5 based on 40 ratings

Review Summary

1 Stars - 2 reviews
2 Stars - 1 reviews
3 Stars - 5 reviews
4 Stars - 9 reviews
5 Stars - 23 reviews

Customer Images

Here's what customers have to say

The lightweight and compact bivvy shelter is well-suited for ultralight activities, with users praising its small packed size and easy setup. However, some report issues with condensation buildup leading to a damp sleeping bag, especially in wetter conditions. The bivvy may also feel cramped, particularly when using a thicker sleeping pad. While suitable as an emergency shelter or for short trips, the product may not be ideal for longer excursions where staying dry is more critical.

AI-generated from the text of customer reviews.

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5 out of 5 stars

October 27, 2025

Light weight Bivy

Light weight easy to find color, enjoying my Bivy. The material is light weight so depending on what you are looking for, some might think this is a little ‘wimpy’ but it is fine for my needs. It will have slight condensation inside, I have tried a variety of bivies and cannot find a way to avoid this. At least everything about this Bivy dries out fast!

Forest T
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

October 22, 2025

OR - Helium Bivy

I used this in the Adirondack High Peaks Wilderness in below-freezing weather with about 30mph winds. It did a great job blocking the wind and keeping out a lot of the chill. As long as you have the correct sleeping bag inside, this bivy will do the job. It's durable and spacious. It fit me no problem and I'm 5'9 ~270lbs. I still had room inside as well. It's also very lightweight and compact. My only complaint is that it doesn't open from the side, so I had to shimmy in and out through the top in freezing weather. This isn't fun as a bigger guy. If you're NOT overweight like me, this shouldn't be too much of a problem.

user image
Zachery T
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

October 21, 2025

Great gear for lightweight backpacking. Really comfortable and pleasant in nice weather.

Lucas E
ExpertVoice.com

Originally reviewed on ExpertVoice.com

4 out of 5 stars

October 16, 2025

Great for a backup

This thing saved me when I thought I’d be sleeping in a Hammock but a cold front came through. Only issue I had was condensation build up. I wouldn’t use it as a primary but it was a handy backup.

Thomas G
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

October 16, 2025

I thought this bivy was very user friendly to set up and light for bikepacking.

Annick C
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

October 15, 2025

Cozy

I used this on a 268 mile 4 night bike packing trip through the Los Padres National Forest. It packs small and is light. It’s easy to set up and tear down making it great for a beginner or expert hiker or bike packer. The zipper is a little funky to use from the inside, especially if you only want the mesh closed. The foot area is a little narrow so stay away from wide sleeping pads. I’m 6’0” 190 lbs and fit with some room to spare but not much. If I used a foam pad that would give me more room than my current 3” air pad.

user image
Samuel P
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

October 10, 2025

Perfect solution for going ultralight in the backcountry!

kyle h
ExpertVoice.com

Originally reviewed on ExpertVoice.com

5 out of 5 stars

October 6, 2025

Super Lightweight

Good to have in emergencies and it is super light weight. Great addition for a bugout bag

Kelvin F
ExpertVoice.com

Originally reviewed on ExpertVoice.com

3 out of 5 stars

October 1, 2025

Not made for larger people, hard to get in/out!

I purchased this for ultralite backpacking paired with a Seek Outside DST tarp, also used was a Thermarest neo air wide pad and their parsec 20d bag. First the bivi was very lightweight and easy to setup BUT a pain in the you know what to get in and out of. I am 5'9" 200# athletic build (think jacked crossfit dude) and although I did fit inside the sleep system I was extremely constricted. I toss and turn while I sleep and mostly sleep on my side, that was near impossible due to my broad shoulders. Also the mesh is pretty good at staying off your face but the nylon attaches inside the head liner and swishes all over your face all night LOL. If I were a small very skinny man using a quilt and 1/2" thick pad I would have slept much better but apparently I need a much roomier bivi.

user image
Stevie Boy
outdoorresearch.com

Originally reviewed on outdoorresearch.com

5 out of 5 stars

September 29, 2025

An excellent, lightweight bivy for solo camping or bikepacking. The packable size made it a very easy fit in my bikepacking kit without excessive bulk. I would recommend taking some rope to provide a little more structure to the overhead space as it can be a bit of a claustrophobic fit. Can definitely be a little humid depending on conditions, but I found it did a good job at keeping out overnight moisture

Jeremy S
ExpertVoice.com

Originally reviewed on ExpertVoice.com