I have lots of survival gears in my garage, my car, and bug out bag for those"just in case"scenario. Bought this again as a gift to my friend who's really into the wilderness like me. I bought 11 last time. This is really a jack-of-all-trades item, I mean you can use it not only for emergencies, like keep you warm while camping, make it a makeshift shelter during an emergency or lay it under the tent or sleeping bag, but also a versatile tarp for daily uses. For me I always tuck it on the windshield to reflect the heat, the sun could get really brutal sometimes.

EDIT: Just noticed a review saying the grommets are ripped off. I've been using this kinda blanket from many brands, Grabber, SOL, SE, UST, you name it. Well, this utool blanket holds up the same as Grabber, better than UST, SOL. But, all of them have this issue, don't count on them to hold off a tornado if you know what I mean. My suggestion is wrapping it around you instead of tying it using the grommets if the wind gets really big.

To be fair, I'm returning these because they weren't the right size for my hybrid camper queen beds. I am ordering the next size up though.
These are light but durable, and I would have kept them if they were the right size.

These are VASTLY sturdier (and quieter) than the tiny tissue thin survival blankets. I used to use one as a tent floor for winter camping-the reflection of my candle lanterns was super magnified-warmer and just made long winter nights better. I also used it in the evenings as a lean to towards campfires- the heat it reflects to your back is really amazing! To make this truly amazing- TWO more grommets-one at the middle of each of the narrow sides; and add FOUR grommets along the long sides, evenly spaced between the corner grommets. Or better yet, make a Double size one with grommets every 18" or 20" to use as a lean to-one part for the floor, one panel for the slanted "roof"! Now that would be a cozy fireside shelter! Not applicable in my outings, but also great for hot desert survival (shiny side toward sun).

Fifty years ago my pastor included a space blanket on a backpacking retreat in the Smokey mountains. It was wise, saving over a pound. It kept him warm. I was impressed. I tried it myself while I was stationed in Turkey about 35 years ago and it kept me warm also. Testing it personally I thought it was too fragile plus I sounded like I was in a snack chip bag every time I moved in the slightest. I ordered this one, It's as tough as a tarp and keeps me warm. I folded and refolded this one enough to know it's much tougher than the originals. This one is different. It's not silent but the toughest lining in this line solves the fragile mylar and goes a ways to mute my crackling objection. I am very happy with the treatment in this model.

Have an infrared thermometer, which measured the temperature of the ceiling inside of my camp trailer, underneath where two of these tarps are placed on the roof, and the area on the ceiling where no tarp exist on the roof.

The ceiling temperature underneath the roof where the tarps were placed was exactly the surrounding air temperature, the ceiling with no tarp was vastly hotter, 10 to 15 degrees hotter. So ordered more to cover the entire roof

So great job keeping the heat out, however, there is a video which shows the tarp not holding up in strong winds, so modified the tarp.

Bought some heavy weed eater line and wrapped it around the outer edge of the tarp and covered with Gorilla tape, then did a line across the middle to divide the longest length, added two grommets

Used some cheap rope from the Dollar Store to tie down

This whole modification adds about $7 and so far, has taken 35 mph wind gust and is holding up very well

The reflective ability of the tarps are worth the cost in the reduced heat, the modification looks like it will allow them to last the summer, if not longer

ADDITONAL COMMENT:

Bought four tarps, wish had not added the weed eater line, it is not flexible and pulls out from under the duct tape, would use the Gorilla duct tape again and add the extra gourmet. The additional two gourmets are an absolute must

These tarps have taken 45 mph wind gust and did not tear, some of the mylar is flaking but overall, it still does what it was intended to do, reflect the heat

As of two days ago removed them from the roof of the camp trailer and it is amazing. Had experienced record setting heat for nearly 40 days and the inside temperature was on average, throughout the day, 6 degrees cooler than outside temperatures in the shade, up until the air conditioner was turned on when inside temperature reached 90%

But now that the tarps are off the roofs inside temperatures matches outside temperature in the shade from early morning throughout the day for exactly the same time period

6 degrees is huge savings for how soon the air conditioner needs to be turned on, it is nearly a two-hour delay, since 27 days in August were 90 degrees or greater, a two-hour delay at ten cents per KW is not a lot of money, $5.40, but if we had not had record heat 111, and a normal year, it would have meant not turning the air conditioner on at all, that is the huge savings

Am tempted to run this test with the same tarps next year, but for the cost and comfort will most likely buy four new tarps next year, it is worth it