I always have one in my pack, along with my first aid kit, and some other emergency gear. There is no reason why not to have one, it's lightweight(Mine weighed in at 4.2 ounces), inexpensive, and much better then a emergency blanket. I hope I never have to use it, but I know it's there if I have too. Buy one or a couple, it's the peace of mind knowing its there. I would recommend this to anyone.
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