Mezonn Emergency Sleeping Bag Survival Bivy Sack

Last updated date: October 26, 2020

DWYM Score

8.7

Mezonn Emergency Sleeping Bag Survival Bivy Sack

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We looked at the top Bivys and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Bivy you should buy.

Editor's Note October 26, 2020:
Checkout The Best Bivy for a detailed review of all the top bivys.

Overall Take

The 37-by-80.7-inch bivy, large enough to wrap around an adult’s body or serve as a blanket for two, fits into a 3.9-by-5.1-inch heat-resistant Mylar bag. Weighing just 4.2 ounces, it won’t take up very much space in your car, backpack or emergency first-aid case.


In our analysis of 14 expert reviews, the Mezonn Mezonn Emergency Sleeping Bag Survival Bivy Sack placed 5th when we looked at the top 6 products in the category. For the full ranking, see below.

From The Manufacturer

The thermal sleeping bag is kept in a small 3.9*5.1-inch bag and weighs only 4.2 ounces. Let you repeat use at any time, you can carry and can be stored in any place, store it in your car, backpack, and emergency first-aid case, etc. It can be easy to find when you have an emergency sleeping bag,and Mezonn emergency heat-resistant Mylar bag is perfect for all emergencies.

Expert Reviews

Expert Summarized Score

5.0
2 expert reviews

User Summarized Score

9.0
587 user reviews

What experts liked

This emergency sack weighs only 4 oz, waterproof and tear resistant. It keeps you warm for 24 hours and also heat resistant
- Mom Junction

What experts didn't like

May only last for a few months.
- Mom Junction

An Overview On Bivys

Originally developed as a one-person shelter to protect mountaineers and climbers from rain and snow during multi-day ascents, the bivouac sack — or bivy sack — now has a wider range of uses. A traditional bivy sack, made from a waterproof, tear-resistant fabric, performs two basic functions: to increase the user’s body temperate and keep them dry.

Bivies — reminiscent of an ultra-lightweight sleeping bag or extra-large rain jacket shell — have all have a built-in head opening and come with features like draw strings around the head opening to seal out moisture, full-length zippers and factory-sealed seams for extra warmth. The outer shell of the sacks are available in many different colors, including bright, attention-grabbing hues like red and yellow to improve the user’s visibility to rescue crews.

The products, which are stored in a compact bag, are ideal for emergency preparedness, backcountry excursions, long-distance biking trips, train running and winter camping. The primitive shelters are ideal for sleeping in technical terrain, where ledges are too cramped for a tent, but can also be used as a poncho, blanket, sleeping bag liner, ground cover. and more. Some bivy sacks are also equipped with a whistle and a nylon core drag string that can used to secure or repair gear, making those options great for emergency situations. Because bivies can be reused, easily stored and often weigh just a few ounces, they’re convenient for travel and outdoor adventure.

What’s the difference between a bivy sack and a bivy shelter? The latter is a low-rise tent that includes mesh panels attached to the head opening or hoops to keep the fabric off your face (think: a fancy bivy sack).

The Bivy Buying Guide

  • Depending on the product, bivy sacks are designed to help users retain up to 90 percent of their body heat.
  • If you’re a tent camper who wants to downsize to a no-fuss shelter, a bivy sack could be the answer; since they require no setup, pitching or breakdown, they’re great for adventurers who want to maximize their time with a fast overnight.
  • Bivies are great alternatives to a tents in warmer temperatures (for example, above 50 degrees Fahrenheit).
  • If you plan to use your bivy sack for camping, increase your comfort by: placing a bottle filled with hot water in the core zone (your crotch or arm pit area) for extra warmth, use a sleeping pad underneath for extra cushion and pull the drawstring around the opening snugly around your head to avoid breathing into the bivy and to seal out moisture.