Shelter ยท Gear Review
Emergency blankets. Cheap, small, and worth knowing how to use.
For most households, a pack of basic blankets spread across the cars and kits is the right start, and the Swiss Safe 4-pack does that for about $10. If you want one that will not shred, the SOL Emergency Blanket is the upgrade. For a blanket you will use again and again, look at the two heavy-duty picks. None of them makes heat. Here is what they do, and how to get the most from one.
Top pick
Swiss Safe 4-pack
Typical price
About $10 for four
Readiness tier
Survive
At a glance: Swiss Safe 4-pack
Strengths
- Four blankets for about $10 puts one in every car and pack without much thought about cost.
- Each folds into a packet small enough for a glove box or first aid kit.
- The film blocks wind and rain, which is most of what a blanket like this is for.
Limitations
- The film is very thin and splits easily once it is nicked or creased.
- It crinkles loudly and rarely refolds to its packet size.
- Some owners report thinner film in later batches than in earlier orders.
By Dan Whelan, founder of New World Survival
Researched from maker specifications, OSHA, CDC, and owner reports. See our sources
The field
Four blankets, from one-use to many.
The table sorts them by what matters most: how many times you can use one, what it weighs in a pack, and where it should live. Specifications come from each maker or its Amazon listing. We did not test these ourselves; the verdicts rest on maker data and owner reports.
New to emergency cover? Our emergency shelter handbook explains blankets, bivvies, tube tents, and tarps, and what the claims on the packet mean.
| Blanket | Best home for it | Size | Weight | Material | Reuse | Typical price |
|---|---|---|---|---|---|---|
| Swiss Safe 4-pack | Glove box, first aid kit | 52 x 82 in | About 1.6 oz listed | Aluminized film, 12 microns | Treat as one-use | About $10 for four |
| SOL Emergency Blanket | Day pack, car kit | 56 x 84 in | About 3 oz | Vacuum-metalized polyethylene | A few uses | About $8 to $10 |
| Arcturus Insulated Tarp | Trunk, camping bin, home | 60 x 82 in | About 1.4 lb | Reflective film and polypropylene fabric, grommets | Many uses | About $25 |
| SOL Heavy Duty | Hiking pack, car kit | 58 x 98 in | About 8 oz | Coated, reflective fabric | Many uses | About $20 |
Every maker here claims its blanket reflects 80 to 90 percent of body heat. We found no independent standard behind those numbers, so we did not rank on them.
Our picks
Spread the cheap ones around, upgrade where it counts.
Top pick
Swiss Safe Emergency Blanket, 4-pack
The thin silver sheet most people picture, sold four to a box for about $10 and carrying close to 18,000 Amazon ratings averaging 4.7 of 5. It wins because the job of a basic blanket is to be there: one in each car, one in each first aid kit, one in the bag by the door. At this price you can do that for the whole household. The trade is durability. Treat each one as single-use and replace any you open.
Find it on AmazonUpgrade pick
SOL Emergency Blanket
About the same size, nearly twice the weight of a cheap sheet, and a different material. SOL uses vacuum-metalized polyethylene and says it will not shred like mylar if nicked, and that it stays quiet in wind. (SOL) Owners largely back the tear resistance. On noise the reports are mixed, and some still find it crinkly. It is bright orange, which helps if you hike. The two-person XL version is about $11.
Search on AmazonHeavy-duty pick
Arcturus Insulated Tarp
A three-layer blanket that pairs a reflective film with polypropylene fabric, 60 by 82 inches, with four grommets for rigging it as a shelter or ground cover. It weighs about 1.4 pounds and comes in a carry bag. With nearly 10,000 Amazon ratings averaging 4.7, it is the blanket owners keep in the trunk year after year. It is stiff, closer to a tarp than a blanket, so plan to wrap it over softer layers.
Find it on AmazonLight heavy-duty pick
SOL Heavy Duty Emergency Blanket
The reusable blanket for a hiking pack. At about 8 ounces it weighs a third of the Arcturus and covers a larger area, 58 by 98 inches. SOL describes it as windproof, waterproof, and durable enough for many trips, usable as a shelter, ground tarp, or gear cover. (SOL) It lists for about $20 on SOL's own store, where it was sold out when we checked.
Search on AmazonAffiliate disclosure: New World Survival earns a small commission on qualifying Amazon purchases at no cost to you. This helps us cover operating costs and keep building new content. We only recommend gear we would put in our own kit. Commission never decides a recommendation. The two SOL blankets link to an Amazon search because we could not confirm a single listing that matches SOL's current model.
What owners actually say
Thin sheets tear. Tough ones feel like tarps.
These patterns come from Amazon owner reviews, including the critical ones, and from long-use write-ups, read November 4, 2026. A pattern means many independent owners said it.
The cheap packs are thinner than people expect
The most common complaint about the Swiss Safe and similar packs is how thin the film is, and how easily it tears once started. Several owners say it should not be called a blanket at all. A few repeat buyers report that a later batch felt thinner than an earlier one. Most still keep them, because they cost little and take no room.
The SOL holds together
Owners who have used SOL blankets on trips describe a sheet that stretches before it tears, can be patched with tape, and survives being refolded. Reports on noise are mixed: some find it quieter than cheap film, others still call it crinkly. The complaint that follows every non-breathable blanket shows up here too: on a long, damp night the inside collects condensation.
The Arcturus is a tarp first
Owners praise how durable it is and keep it in cars for years. Critical reviewers say it is stiff and does not drape like a blanket, and some report that it holds water once it gets wet rather than shedding it like a plain tarp. The grommets get steady praise from campers who rig it overhead or lay it under a tent.
Nobody wants to rely on one alone
Across brands, owners who used one through a cold night tend to say the same thing: it helped, but not by itself. The comfortable ones had a coat, a hat, or a wool blanket underneath it.
The one thing to know
It keeps heat in. It does not make any.
An emergency blanket is a wind and rain barrier with a shiny side. It works best as the outer layer over everything else you have. OSHA's first aid steps for a cold person describe the same order: wrap the whole body, including the head and neck, in layers of blankets with a vapor barrier such as a tarp outside them, and do not cover the face. (OSHA)
Take off wet clothing and put on dry clothing, then wrap up. OSHA notes that wetness, even from sweat, speeds heat loss, and that wind carries heat away faster. Tuck the edges under you or sit on them so wind cannot get underneath, and put something between you and cold ground.
A blanket cannot treat hypothermia. CDC lists the warning signs in adults as shivering, exhaustion, confusion, fumbling hands, memory loss, slurred speech, and drowsiness. A body temperature below 95°F needs medical attention right away. If help is not available right away, CDC's steps are to move the person somewhere warm, remove wet clothing, and warm the center of the body first: the chest, neck, head, and groin, with an electric blanket if you have one or skin-to-skin contact under loose, dry layers. Once they begin to warm, keep them dry and wrapped, head and neck included, and get them medical care as soon as possible. Never give alcohol, and give nothing by mouth to someone who is not awake. If the person is unconscious and seems to have no pulse or breathing, handle them gently, get emergency help immediately, and start CPR even if they appear dead. Keep going until they respond or help arrives, and keep warming them while you do. (CDC)
How they fail, and what they cost over time
Cheap to own, easy to replace.
Splits along the creases
Thin film tears once nicked, and a refolded sheet splits where it was creased. Keep basic blankets sealed until needed, carry more than one, and replace any you open.
Damp inside
None of these breathe. Over hours the inside collects moisture from your body. Keep your face uncovered and the blanket a little loose over your other layers.
Grommets and seams
Some owners reinforce the grommets with tape before rigging a heavy-duty blanket as a shelter in wind. Dry a heavy-duty blanket fully before packing it away.
The cost
Basic blankets cost about $2 to $10 each and are replaced after use. A heavy-duty blanket is about $20 to $25 once and can last for years. There is nothing else to buy.
What we didn't pick, and who should skip
Good options, wrong fit for most kits.
Primacare 10-pack
The same kind of thin silver sheet as our top pick, ten for about $15, with about 12,000 Amazon ratings. A fine buy if you are stocking several cars, a church, or a classroom kit.
Grabber Space Brand blanket
The original single space blanket, 56 by 84 inches and about 3 ounces, for about $10. Grabber claims 80 percent rather than 90. It costs as much as the SOL, which we prefer for its tear resistance.
Skip a blanket for a long night out
If you hike where you might wait all night, a bivvy you climb into closes out the wind, and a breathable one keeps you drier. Our emergency shelter handbook compares them.
Skip it as your only warmth
In a car in winter, a wool or fleece blanket, a hat, and gloves do more than any reflective sheet. Keep both. Our winter driving guide covers the rest of the car kit.
Skip the all-in-one kit bundle
Many kits add one thin blanket to a pile of tools. Buy blankets on their own and put them where each person will be.
Skip the heavy-duty one for a glove box
At over a pound, the Arcturus belongs in the trunk or a camping bin. A packet-sized blanket is what fits in a glove box or first aid kit.
Where it fits in your readiness
One per person, wherever people go.
Emergency blankets belong in the Survive tier. They earn their place most in winter storms, in a car stuck on a cold road, and through power outages in cold weather, layered over everything else you have.
Questions people ask
About emergency blankets.
Do emergency blankets really keep you warm?
They help you keep the heat you have. They block wind and rain and reflect radiated heat back toward you, but they make no heat of their own. The 90 percent figure on most packets is the maker's own claim about radiated heat, not a measure of total warmth. Wear every layer you have underneath, and keep yourself dry.
Are mylar emergency blankets reusable?
The cheapest film sheets are best treated as one-use. They split along creases and rarely refold to their packet size. Thicker blankets such as the SOL Emergency Blanket stretch before they tear, and heavy-duty blankets such as the Arcturus and the SOL Heavy Duty are built to be used many times.
How many emergency blankets should I keep in a car?
One per person who regularly rides in the car is a simple rule, plus a spare. They take almost no room. Keep real warm layers too: a coat, a hat, gloves, and a wool or fleece blanket do more than the reflective sheet does.
What is the difference between an emergency blanket and a bivvy?
A blanket is a flat sheet you wrap around yourself. A bivvy is a sack you climb into, so wind cannot get underneath. A bivvy costs more and suits a hiking pack or a long wait outdoors. Our emergency shelter handbook compares blankets, bivvies, tube tents, and tarps.