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Snugpak Stratosphere Review

A cold-weather bivy that is spacious but doesn't breathe well
Snugpak Stratosphere
Photo: Snugpak
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Price:  $219 List | $192.44 at Amazon
Pros:  Roomy, weather-resistant
Cons:  Heavy, not very breathable, time-consuming setup
Manufacturer:   Snugpak
By Brian Smith ⋅ Review Editor  ⋅  Nov 8, 2021
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42
OVERALL
SCORE


RANKED
#9 of 9
  • Weather Resistance - 25% 6
  • Weight - 25% 1
  • Comfort - 20% 6
  • Ventilation - 15% 3
  • Packed Size - 15% 5

Our Verdict

While the Snugpack Stratosphere has more space than most bivy sacks we have tested, it was below the curve when it came to most of our testing criteria. Our biggest concern was its breathability. In warmer temps, we became uncomfortably hot and stuffy inside, with sweat and condensation building up within minutes. That being said, in a colder mountainous climate with snow on the ground, the Stratosphere's warmth was welcome. This bivy sack is also heavier and bulkier than most of its competitors and pretty expensive, considering its poor performance overall. The canopy over the head and shoulders is spacious, with a mesh opening that helps ventilate this portion of the shelter.

Compare to Similar Products

 
Snugpak Stratosphere
Awards  Editors' Choice Award Best Buy Award Top Pick Award Top Pick Award 
Price $219 List
$192.44 at Amazon
$178.95 at Amazon
Compare at 2 sellers
$140 List
$139.95 at Amazon
$200 List$60 List
Overall Score Sort Icon
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Star Rating
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Pros Roomy, weather-resistantLightweight, weatherproof, roomy, ease of use, bug screenLightweight, versatile, stows easily, price is rightExtremely lightweight, packableLight, durable, warm, affordable
Cons Heavy, not very breathable, time-consuming setupStuff sack too largeLeaky zippersExpensive, no zipperNot waterproof, tight fit for taller individuals
Bottom Line A cold-weather bivy that is spacious but doesn't breathe wellThis very well may be the new standard in what we expect from a top-notch bivy sackThis model boasts an enticing weight, comfort, and versatility ratioAn effective and lightweight bivy that far outperforms other emergency or minimalist sheltersThe Escape is an excellent lightweight choice for cold dry climates or emergency situations
Rating Categories Snugpak Stratosphere Outdoor Research He... Sierra Designs Back... MSR Pro Bivy SOL Escape Bivvy
Weather Resistance (25%)
6.0
8.0
7.0
6.0
3.0
Weight (25%)
1
6.0
7.0
8.0
8.0
Comfort (20%)
6.0
9.0
7.0
5.0
4.0
Ventilation (15%)
3.0
9.0
8.0
6.0
4.0
Packed Size (15%)
5.0
7.0
8.0
9.0
8.0
Specs Snugpak Stratosphere Outdoor Research He... Sierra Designs Back... MSR Pro Bivy SOL Escape Bivvy
Measured Weight (oz.) 38.6 oz 16.3 oz 13.6 oz 8.9 oz 8.4 oz
Packed Size (in.) 12" x 6" 4" x 12.5" 3" x 9.5" 8" x 3.5" 4" x 7.5"
Waterproof? 5000mm waterproof coating Yes Yes Yes Water-resistant fabric with waterproof seams
Open Length (in.) 86" 82" 80" 88" 84"
Shoulder Width (in.) 30" 26" 36" 36" 31"
Material (top/bottom) 50D Nylon Ripstop/210T Nylon with 8000mm waterproof polyurethane coating Top: Pertex Shield 2.5L 100% nylon Bottom: 100% 40D nylon Top: 20D Nylon Ripstop
Bottom: 30D Nylon Ripstop
20D ripstop nylon 2 ply breathable 1000mm Metalized Spun-bonded Olefin
Bug Mesh? Yes Yes Yes No No
Sleeping Bag or Pad Attachments? No Yes No No No
Poles? Yes Yes, one overhead shockcorded Delrin pole No No No

Our Analysis and Test Results

The Snugpack Stratosphere is one of the more spacious bivy sacks we tested, with plenty of room around the head and shoulders. It resisted light to moderate, short-lived rain showers during our testing, but longer storms penetrated the fabric. At 38.8 ounces, it's heavyweight and somewhat bulky with a packed size of 6 inches by 12 inches. Our biggest concern is its lack of breathability. Even though its canopy is well ventilated, when zipped up, it becomes instantly stuffy and hot. The nylon material with a polyurethane coating simply does not breathe sufficiently, ultimately leading to excessive heat and condensation within. For its high cost, we were not impressed by the Stratosphere's overall performance.

Performance Comparison


The Snugpak is most ideal for colder weather excursions.
The Snugpak is most ideal for colder weather excursions.
Photo: Brian Smith

Weather Resistance


We tested the Stratosphere in various weather conditions and found that it performed best in colder, drier climates. While it was resistant to light to moderate rain showers, heavier rains eventually penetrated the nylon fabric with water pooling inside, leaving us in a swampy bivy.

The spacious canopy can be staked out and has a covered mesh opening, keeping most precipitation off your head and shoulders while providing some ventilation. The lack of waterproofing lies within the material itself, which did not keep us dry during significant rain events.

Heavy rain penetrated the material.
Heavy rain penetrated the material.
Photo: Brian Smith

Weight


This is one of the heaviest bivy sacks that we tested. At 38.6 ounces (2 pounds, 6.6 ounces), the Stratosphere is almost as heavy as some of the lightest 2-person tents these days.

Most people tend to purchase bivy sacks to save weight and space in their packs.

While the Stratosphere is still lighter than most tents, there are many bivy sacks available that offer much more significant weight savings.

This is one of the heaviest bivy sacks we've ever tested.
This is one of the heaviest bivy sacks we've ever tested.
Photo: Brian Smith

Comfort


Easy to get into and out of, with a roomy zone around the head and shoulders, this was one of the higher scoring metrics for the Stratosphere. The roominess extends throughout the length of this bivy, with ample space to sleep on your side and wiggle your toes.

Discomfort reared its head quickly, though when we zipped the Stratosphere closed, creating an unwanted sweat lodge inside.

This bivy provides plenty of space, but is uncomfortably hot in this...
This bivy provides plenty of space, but is uncomfortably hot in this high desert environment.
Photo: Brian Smith

Ventilation


With the zipper open in cold temperatures, there is sufficient ventilation in the Stratosphere. However, in warmer temperatures or with the zipper closed, we felt too hot and stuffy within minutes. Even though the open canopy provides some ventilation, the lack of breathability was very uncomfortable, almost claustrophobic.

The long zippered opening also has velcro closures, so ventilation can be increased by using velcro instead of the zippers. Unfortunately, this system of ventilation is finicky and allows moisture in. The better solution is to create ventilation within the material itself by using a material that breathes better while keeping precipitation out.

Underneath the staked out canopy is a mesh opening that provides...
Underneath the staked out canopy is a mesh opening that provides some ventilation.
Photo: Brian Smith

Packed Size


Despite its heavyweight, the Stratosphere actually packs down to a reasonably small size. The poles collapse down pretty short, and the stuff sack is just big enough to stuff a rolled-up bivy into. A couple of compression straps help minimize size, but if you loosen them too much, they come out of their buckles.

There are still many smaller options out there for packed bivies, but if weight and size aren't crucial, the Stratosphere could work just fine for you.

For its weight, the Snugpack packs down surprisingly small.
For its weight, the Snugpack packs down surprisingly small.
Photo: Brian Smith

Value


For its high price tag, the Stratosphere's performance did not meet our expectations. At this cost, a bivy sack should be highly breathable, lightweight, and keep you pretty dry, even in heavy rain.

Conclusion


There is a lot of room for improvement in the Snugpack Stratosphere. Most importantly, the material needs to be more breathable. This could be achieved concurrently with shaving quite a bit of weight. On the other hand, we liked the openness of the design. Most bivy sacks feel too small, but this one had plenty of room to wiggle around in. We would probably feel okay staying in it for one snowy night, but warmth or heavy rain would render this shelter pretty useless.

Brian Smith

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