QIO CHUANG Emergency Mylar Thermal Blankets -Space Blanket Survival kit Camping Blanket (Pack of 6). Perfect for Outdoors, Hiking, Survival, Bug Out Bag ，Marathons or First Aid

Forgot to leave a review a while back ago when I bought these. They came on time and was packaged great. Was definitely worth the money.

Most emergency supplies never do get used or tested--so it occurred to me that I should actually put some of these space blankets to use and see whether they work for insulating a space (and if they might really save your life in a winter emergency). I've taken a few of these blankets from the pack, opened them up and draped them over a bakers' rack to close it in, with some duct tape to secure them. The duct tape adheres to them very well, and while the mylar material feels so flimsy you'd think it would instantly tear, they're actually pretty hard to cut. I had to use scissors to make openings for cords, because I couldn't get through the mylar with just my hands. However, the mylar DOES scrape off pretty easily, leaving clear plastic behind--so don't drag these around a bunch of sharp objects or you'll lose that mylar coating. The grow lights on the shelves inside this enclosed bakers' rack produce some heat, but they're in an unheated shop space that is currently sitting around 45 degrees F. It is protected from wind, and kept above freezing, but there are minor drafts. Without any enclosure, the lights were not capable of heating the trays of seedlings enough to prompt germination. Literally minutes after wrapping the top and sides of the rack with these space blankets, the temperature in the rack rose to 55 degrees F--the bottom isn't enclosed at all and the grow lights are LED, so they're not cranking out all that much heat. Given those circumstances, I'm pretty impressed with the amount of insulation just a single layer of mylar provides! Weirdly, you can see right through these space blankets once the grow lights are on. It's like looking through a 2-way mirror. Might be a useful trait to explore; for the grow tent, it's neat because I don't have to open up the enclosure to see the seedling trays inside. So, not really an emergency test for these space blankets, but I'm happy to see that they really do capture heat and provide insulation. I think I'd want multiple layers of them around me if the weather were extremely cold and I needed to stay warm in an emergency--one layer, as I mentioned, is only keeping the plants about 10 degrees warmer than the surrounding atmosphere, in an area protected from wind. If the emergency scenario involves freezing conditions, I think more than one layer would be necessary for survival.

Can use these for camping, prepping, emergency situation ( I keep a few in the car)

lightweight good ease to use heat ok

These should be in everyone's car. Camping kit, hiking you just never know.

cheep for a reason

I take one camping, keep one in the car, they're cheap and lightweight but could save a life. We've used one to make an improvised ice box, also they are high visibility so can attract attention if you need it. Lots of uses for a space blanket, and inexpensive enough to use one in non-emergency situations. They're pretty much one time use, so keep a spare.

We have several portable air conditioners in our house, and in the middle of summer it can still get quite warm due to the uninsulated exhaust hoses and window covers. I read another review where the purchaser used these blankets on their windows. I figured I might as well try them on the exhaust hoses and windows. (Exhaust blankets are around $30 each fyi) The rooms are now nice and cool while the outside temperature is 90 degrees, and hasn't reached the high. Definitely a big improvement of at least 10 degrees. These do tear easily once they are cut, so know your dimensions beforehand.