This Thermal Mylar foil blanket assists in body heat retention in emergency situations. It is folded to a compact size, but unfolds to a full 84" x 52". Bagged and sealed for easy storage, this potential life-saver is an essential inclusion for survival sets, bugout bags and hypothermia prevention and management kits.
Dimensions: 3"L x 2¼"W x ½" thick
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This are small and compact can fit into any kit and great price point.
Helping me watch out for the "H" in the MARCH care guidelines.
Hence the name "space blanket"... while not terribly effective, they are also not terribly expensive, heavy or large. And could make the difference.
These devices, although widely used by EMS providers and rescue agencies don't actually work. Whilst they may provide shelter from wind/rain, once they fog up they actually reflect no heat back to the body. There is no scientific evidence to support their use, and in fact studies which show a sealed polythene rubbish sack actually do a better job. Makers of these blankets need to back up their advertising claims with some evidence.