【Bivvy Sack Mylar Sleeping Bag】reflects back 90% of body heat. Wearing emergency sleeping bags for survival prevents your body temperature from going down. Our emergency bivvy bag is extra large in size, 84 inches in length and 36 inches in width. Emergency sleeping bags 4 pack can serve as an emergency blanket, ground blanket, emergency rain poncho, rain tarp or sun shade. First Aid, O. 【Mylar Sleeping Bag Emergency】Mylar foil is naturally thin, lightweight, soft, waterproof, windproof, tear proof and puncture proof. Sunshine, rain, snow, sleeping bag emergency will get you covered. camping bivy sacks survival sleeping bag waterproof bivouac bag military bivy sack sleeping bivy patriot emergency sleeping bag 【Bivy Sack For Sleeping Bag】Each pack weight only 2.8 oz (3.0 oz with the carry bag). Each pack is 7 inches by 3 inches. Survival sleeping bags waterproof is very light weight and easy to carry and store in your car or motorcycle, back pack or in your emergency kit. Survival sleeping bags lightweight comes with its own carry bag with draw string. L. 【FOUR Emergency Bivy Sack】were included, ready for your next adventure. Survival bivy is intended as an emergency shelter, but it is also great for camping, hiking, and protection from the cold outdoors. Upgraded head cover is 21 inches wide. Bivy sack will allow you to cover your head completely. Emergency Sleeping Bag really keep your whole body warm! 120 Decibel whistle can be used for help during emergency. 【Bivy Sack Emergency Sleeping Bags】are made from mylar foil (NASA technology). Emergency sleeping bag is life saver in emergency. Emergency bivy is asset when the temperature is low. Bivy bag is essential gear in your emergency bags survival. Survival sleeping bag saves life during disaster, snow, car break down, automobile danger. Emergency Radio S.