Emergency Mylar Thermal Blanket
|Price:||$6.70 - $22.60|
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From the manufacturer
Mylar Solar Emergency Thermal Survival Blanket
-Emergency Mylar Blanket, also called a solar blanket, can prevent you from losing body heat.
-Perfect for emergency protection in all weather conditions
-Waterproof and windproof
-Will not crack, mildew or shrink
-Reflects 90% of your body heat back to you
-Large size (84" x 52")
Disposable rescue blanket keeps in body heat and preserves body temperature. Small enough to fit in most first aid kits.
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Some people complain that it doesn't keep them warm at all. This is most likely because they aren't using it properly. There are better articles for this information than this review, but essentially.. This blanket prevents heat-loss from radiation (which is how the majority of our body heat is lost). Radiation is when heat radiates away from its source. This is where the product shines: it allows hot pockets of air to form between you and the blanket. It doesn't do much to protect against conduction since it's so thin. Conduction occurs when heat transfers from one place to another by touching. When you grab an ice-cube, you are losing heat because of conduction. Similarly, if you are in a very windy area, while the blanket itself is wind-proof, the cold air can get under and inside the blanket, stealing away your warmth.
As such, when using this blanket, you should squat down and wrap it around you. By laying on the bare ground, there is no "dead air space" for the hot air to collect so, by the process of conduction, your body looses heat through the ground. This product works really well as a sort of "base layer" type of blanket. If you have a sleeping pad and sleeping bag, line the insides of your sleeping bag with one of these and you'll be toasty in no time. Just be sure not to start sweating too much, because of hypothermia and stuff. Even without those fancy sleeping bags, one of these covered by a wool blanket will keep you very warm. Just remember not to wrap the blanket to tightly around you. It is instinctive when you want to get warm, but it'll decrease the effectiveness and may rip it since it's so frail.
Five stars because it does what it is intended to do. And while it's quality isn't super, and it isn't made out of top-notch ballistic nylon, it isn't being marketed as if it were. It is intended to be a cheap, disposable cover to be used in emergencies, and it does that job wonderfully.
FYI The blankets I received are made by B-H Supplies, a 52" by 84" (not 54" by 82" if it matters) and holds in 90% of body heat. Also it sounds like tin foil when you are moving around. My father added that in his survival training they said use two, one for the floor so your body heat does not escape into the ground and one around you while covering your head for maximum warmth.
I may just order another 10 of these, and craft something cool for a cosplay event or some such thing. The material is super thin (it's actually see thru if covering your eyes), super light, and way more durable than it looks (because it looks like tin foil, and that rips easily). I may even use it to winterize some old hats that lost their liners.
If you intend to use it like a see thru wind breaking face shield like in my photo, be absolutely sure your neck tiedown is loose to allow air through, and punch air holes where your mouth will be. If you don't take those precautions, YOU COULD DIE. Mylar can suffocate you if misused, so be super careful if you dare try that, and be sure to have a knife handy to cut yourself free just in case. Be safe out there.
All in all, I'm very happy with this purchase!