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I have only purchased the inexpensive kind. That cost a couple of bucks. These work by using a metalized plastic to reflect 90% of body heat back to the person. They are light and compact. The natu...
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#1: Initial revision
by
James Jenkins
·
2020-09-23T12:48:56Z (about 4 years ago)
I have only purchased the inexpensive kind. That cost a couple of bucks. These work by using a metalized plastic to reflect 90% of body heat back to the person. They are light and compact. The nature of the design, makes them noisy. There are some products marketed as 'Silent' but I did not find any reviews verifying the claim. [example](https://www.amazon.com/Jolmo-Lander-Emergency-Blankets-Survival/dp/B071YCNLKW)