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When the lights go out at dinner time, the kit by the door is the one that gets used. This comparison of the best emergency preparedness gear looks at what each listing states: coverage, materials, water protection and pack size. The Leberna sleeping bags add a signalling whistle, and the Mart Cobra blankets are the largest flat sheets here.
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Quick picks
Best Overall Leberna Emergency Sleeping Bags: 2-pack with 120-decibel whistle and head cover Check price on Amazon
Best Blankets Mart Cobra Emergency Blankets: 4-pack at 82 by 52 inches, the largest sheets here Check price on Amazon
Best Single Bag Mart Cobra Emergency Bivy: Single 84 by 36 inch bag with sealed seams Check price on Amazon
The picks
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 | Leberna Emergency Sleeping Bags | 9.6/10 | Buy on Amazon |
| 2 | Mart Cobra Emergency Blankets | 9.6/10 | Buy on Amazon |
| 3 | Mart Cobra Emergency Bivy | 9.4/10 | Buy on Amazon |
Leberna Emergency Sleeping Bags
A 2-pack of Mylar emergency sleeping bags with a 120-decibel whistle, head cover and carry bags.
Pros
- 120-decibel whistle for signalling stated
- 84 by 36 inches with a 21-inch head cover
- 2.8 ounces per bag with drawstring carry bags
- Drawstring carry bag included with each bag
Cons
- No warranty term is stated
- Mylar is thin by design, per the listing
- Silver only; no high-visibility color
- Whistle is the only signalling gear
Detailed Review
The listing states a 2-pack of Mylar emergency sleeping bags at 84 by 36 inches with a 21-inch head cover and a 120-decibel whistle. Each bag weighs 2.8 ounces (3.0 with the carry bag) and packs to 7 by 3 inches with a drawstring bag. The listing notes the Mylar is very thin by design. No warranty term is stated.
Who it's for: hikers and drivers who want full-body emergency shelter with a signalling whistle. Who should skip it: anyone who wants a stated warranty or a roomier bag.
Its Solar Score of 9.6/10 comes from performance 30/35, build 20/25, value 21/25, safety 7/10 and warranty 0/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Size | 84 x 36 in |
|---|---|
| Weight | 2.8 oz each |
| Whistle | 120 decibel |
| Pack | 2 bags |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Water resistant and windproof Mylar with 120-decibel whistle stated, so safety scores 7 of 10. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Mart Cobra Emergency Blankets
A 4-pack of aluminized Mylar emergency blankets at 82 by 52 inches.
Pros
- 4 blankets in the pack
- 82 by 52 inches each, the largest here
- Reusable material stated
- Tear-resistant, water resistant and windproof stated
Cons
- No warranty term is stated
- Blankets, not sleeping bags; no enclosure
- 0.01 millimeters thin
- Packed size is not stated
Detailed Review
The listing states a 4-pack of aluminized Mylar emergency blankets at 82 by 52 inches each and 0.01 millimeters thick. The material is stated as tear-resistant, water resistant and windproof, and reusable. No warranty term is stated.
Who it's for: owners who want the most coverage in a compact kit. Who should skip it: anyone who wants an enclosed sleeping bag.
Its Solar Score of 9.6/10 comes from performance 29/35, build 20/25, value 21/25, safety 6/10 and warranty 0/5: 76 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Pack | 4 blankets |
|---|---|
| Size | 82 x 52 in |
| Thickness | 0.01 mm |
| Material | Aluminized Mylar |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Tear-resistant, water resistant and windproof Mylar stated, so safety scores 6 of 10. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Mart Cobra Emergency Bivy
A single orange Mylar foil emergency sleeping bag at 84 by 36 inches with sealed seams and a Velcro pouch.
Pros
- 84 by 36 inches in a single bag
- Sealed seams stated
- Orange color for visibility
- Velcro pouch included
Cons
- No warranty term is stated
- No whistle or signalling gear stated
- Weight and packed size are not stated
- One bag per pack
Detailed Review
The listing states a 1-pack Mylar foil sleeping bag at 84 by 36 inches in orange, with sealed seams and Velcro pouches. The title and bullets describe a bivy sack, while the spec table lists a sleeping bag; we trust the title and bullets. Weight and packed size are not stated, and no warranty term is stated.
Who it's for: owners who want one bright, enclosed bag for a car or pack. Who should skip it: anyone who wants a stated weight, a whistle or a multi-pack.
Its Solar Score of 9.4/10 comes from performance 27/35, build 19/25, value 19/25, safety 0/10 and warranty 0/5: 65 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Pack | 1 bag |
|---|---|
| Size | 84 x 36 in |
| Material | Mylar foil |
| Color | Orange |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. This product does not plug in or run on a battery, so safety is not part of its score. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
Compare the picks
| Gear | Solar Score | Pack | Key spec | Water protection | Warranty | Amazon |
|---|---|---|---|---|---|---|
| Leberna Emergency Sleeping Bags | 9.6/10 | 2 | 120dB whistle | Water resistance stated | Not stated | View on Amazon |
| Mart Cobra Emergency Blankets | 9.6/10 | 4 | 82 x 52 in each | Water resistance stated | Not stated | View on Amazon |
| Mart Cobra Emergency Bivy | 9.4/10 | 1 | 84 x 36 in | Not stated | Not stated | View on Amazon |
Specifications are manufacturer rated as listed, collected 22 October 2026.
How we scored them
The Solar Score weighs performance, build, value, safety and warranty. For emergency gear, safety means stated water protection and signalling; one pick states a 120-decibel whistle. None of the three state a warranty term. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Leberna Emergency Sleeping Bags | 9.6 | 30 | 20 | 21 | 7 | 0 |
| Mart Cobra Emergency Blankets | 9.6 | 29 | 20 | 21 | 6 | 0 |
| Mart Cobra Emergency Bivy | 9.4 | 27 | 19 | 19 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
How to choose the best emergency preparedness gear
Match the shape to the job
Blankets are flat sheets at 82 by 52 inches; the sleeping bags enclose the body at 84 by 36 inches. The Leberna 2-pack adds a 21-inch head cover and a 120-decibel whistle, which the flat blankets and the single Mart Cobra bag lack.
| Gear | Coverage | Weight stated |
|---|---|---|
| Leberna Emergency Sleeping Bags | 2 sleeping bags, 84×36 in | 2.8 oz each |
| Mart Cobra Emergency Blankets | 4 blankets, 82×52 in | Not stated |
| Mart Cobra Emergency Bivy | 1 bag, 84×36 in | Not stated |
Check water protection
The Leberna and Mart Cobra blanket picks both state water resistance, and the blankets add windproofing and tear resistance. The single bag lists sealed seams but no water rating in its spec table. Keep any Mylar kit dry in its pouch.
Mind the weight
Each Leberna bag weighs 2.8 ounces, or 3.0 ounces with its carry bag. The Mart Cobra listings do not state a weight. See our best emergency radio under 50 for the communications side.
Sizing Notes
- The sleeping bags state 84 by 36 inches, with a 5.83-foot height recommendation on the Leberna.
- Keep Mylar gear dry in its carry bag; the material is thin by design.
- A 120-decibel whistle is stated only on the Leberna.
- Store one set in the car and one at home.
Frequently Asked Questions
What counts as emergency preparedness gear?
Shelter and signalling gear for outages and bad weather. This group covers Mylar blankets and sleeping bags, plus a 120-decibel whistle for signalling.
What is the difference between the blanket and the sleeping bag?
Blankets are flat sheets at 82 by 52 inches; the sleeping bags enclose the body at 84 by 36 inches. The Leberna 2-pack adds a head cover and whistle.
Are these water resistant?
The Leberna bags and Mart Cobra blankets state water resistance, and the blankets also state windproofing, per the listings. The single Mart Cobra bag lists sealed seams only.
Do any of these state a warranty?
None of the three state a warranty term.
Related guides
See every Camping and Emergency Gear guide and all Power Stations and Generators guides. Also see our best home backup power station for hurricane. Also see our best portable power station for camping.
More picks: best emergency radio under 50, best home backup power station for hurricane, best portable power station for camping.
