Lightweight Thermal Bivvy Sack for Camping Hiking Outdoor Survival

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1. L Chewski Verified Buyer – 3 October 2024

   This emergency sleeping bag, thermal bivvy sack is much more than inexpensive standard emergency blankets. The material of this emergency bivvy is more like Tyvek wristbands which are made of nylon or polyethylene. This is both lightweight and funcitonal. The material difficult to puncture stretch or tear/shred.There is much more manufacturing to make this emergency bivvy. There is an addtional honeycombed layer of reflective coating of shiny polyethylene or mylar bonded to the nylon. The bag is shaped as a tapered full length & width sleeping bag that has a drawstring cord to cinch around the top to protect the head. There is a partial 1/3 length of zipper to easily get in and out. But the only bad thing is the zipper pull is on the outside versus on the inside too. I have to stick my arm back out to zip up and unzip, which is much more of a pain to do when trying to stay warm and dry. A double pull zipper would be far more functional. There is also a separate carry bag made of the same material. What’s not mentioned at all in the product information is the at the tip of the carrying bag, there is an emergency whistle attached to the drawstring cord. This is helpful to get attention in an emergency. I got the orange color model and it’s bright and visible from far away distances. Flipping the bivvy inside out also reflects light and can be used to reflect the sun as a signaling device too. This emergency bivvy can be used in conjunction with a sleeping bag if temperatures fall below the rating of my sleeping bag. Or this can be used on its own when hiking or other inhospitable conditions and immediate shelter is needed. This emergency bivvy fully encloses me completely to keep my body temperature in and keep me dry. It’s much more difficult to stay fully covered from a rectangular sheet of an emergency blanket.

   

2. Bober Verified Buyer – 13 October 2024

   Windproof, but NOT waterproof. I trusted the description and ended up cold and soaking wet in the mountains. At least don’t lie in item description.
   

3. jo Verified Buyer – 5 December 2024

   Takes up no space, and quality is much better than a little price of plastic!
   

4. x-jien Verified Buyer – 9 December 2024

   I got this on a bit of a gamble, going hammock camping in Pennsylvania in January. It was in the 40s and raining the entire time, with extremely high air humidity.

   I used it as an extra waterproof layer around my sleeping bag inside my hammock. Even using a sleeping bag that was probably lighter than I should have gone out with:
   The bag did not tear even though I am awkward getting into a hammock and had to pull it pretty hard.
   The hammock got wet, I did not.
   The air was cold enough that I needed a face covering, but my body and legs were so warm that I took off my base layer.

   I’ll be buying another couple of these for camping and emergency use.
   

5. Ray Kanoc Verified Buyer – 12 January 2025

   Warm and durable
   

6. Anfernee Verified Buyer – 21 January 2025

   Durable. Cord locks for drawstring on sewn loop near top of zipper. Heat reflective material printed on fabric into pattern with small space in between. Heat reflective non insulated. Water will pass through nylon in between printed Heat reflective material. Is not water proof in the slightest. Definitely worth the money. Does everything stated other than the waterproofing.
   

7. Robert P. Verified Buyer – 14 March 2025

   This is pretty quiet and adds some r value to your bag. Light weight and resistant to water. Easily reusable but I feel like the price is high compared to others I have purchased without noticable differences.
   

8. HEATHER CHATIGNY Verified Buyer – 25 March 2025

   This worked well in a TRAINING environment. It did not break or tear when I had sticks at my feet. Zipper seemed pretty sturdy. I had to pull the hood down around my head to keep air out. But overall it did its job. I will say at 34 degrees F… I was not super toasty. But I did not get super cold either….Shivers yes. I used this in combination with a tarp with reflective heat surface.

   If you are stuck in real life…build your shelter lowest to the ground. It keeps you from having to heat extra space with your breathe.