One of the most essential pieces of camping and hiking equipment is the survival blanket. Survival blankets play a crucial role in your disaster preparedness plans, and you should always have one in case of a cold snap while you’re out in the wilderness. With that said, if you already don’t you definitely should look to invest in a quality survival blanket.
Source: http://www.themostpopular.com.au/the-most-popular-types-survival-blankets/
