If you've never actually used one of those foil (mylar) emergency blankets, you might be wondering how well they actually work. I certainly did! That's why I decided to test one out. But of course that wasn't enough, so I tested not one but two mylar bivvy sacs too just to see how they compare to a standard emergency blanket.

Here are the Emergency Bivvies from this video:
Go Time Gear Life Bivy: https://amzn.to/458Zdl7
Esky Emergency Sleeping Bag: https://amzn.to/489ZLtD

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