Best Bivy Sacks

Pricier than other brands, but high quality and comfort make it worth it.

Highly water-resistant and built from durable fabric. High quality seams, stitching, and zipper. Comfortable. Olive drab green, so it blends in with the environment. Resists punctures and tears. Reflects back 70% of body heat.

Emergency Sleeping Bag Kit

Is a bit tight, small; not really for anyone tall or large. Pricing is a little high. Some complaints that it doesn't keep you warm if temperatures drop lower than 40 degrees Fahrenheit.

Best Bang for the Buck

While some had issues with its durability, this is an extremely affordable option that you can upgrade by picking and choosing from a variety of survival tools.

A number of different kits come with option such as a knife, compass, fire starter, and pocket tool. Three foot by seven foot size, and weights 5.8 ounces. Constructed of a heavy-duty aluminized PE interior material. Priced very low, and includes a drawstring carry bag.

Emergency Survival Mylar Thermal Sleeping Bag

Some buyers report that the material is very thin and tears easily.

Leberna

A good, effective choice for survival kits, this set of 2 bags is also an inexpensive option.

Comes 2-to-a-box, each with its own carry bag. Constructed of durable double-sided Mylar material. Waterproof and windproof. Reflects back 90% of body heat. Decent price, particularly for 2. Packs up small and light. Well made and durable.

Emergency Thermal Sleeping Bag

On the small side, so it's not really built for larger people. Some complaints that there are no zippers or cushioning with these.

Go Time Gear

A rugged, mid-priced option that is big enough for larger-sized people and comes with extras such as an emergency whistle.

Comes with a nylon sack for storage, a 120-decible emergency whistle, and a 550 pound nylon core drawstring. Ultra-lightweight and compact. 26um Mylar resists tears and punctures. Reflects 90% of body heat back to you. Weights 4.1 ounces. Good size, even for larger people.

Emergency Survival Compact Sleeping Bag

Some reports of the carry sack ripping easily. Bag isn't very breathable, allowing condensation to form on the inside.

Survival Frog

Works very well to preserve your body heat in an emergency, as well as guard against wind and water.

Available in Safety Orange or Tactical Green. Material is an ultra-lightweight HeatEcho reflective polyester film. Reflects 90% of your heat back to you. Weights 4.8 ounces. Tear-resistant, as well as wind and waterproof. Works well. Large-sized bag. Reinforced taped seams.