I have used one of these SOL Emergency Blankets in our Hunter Education classes for over 10 years. In every class we demonstrate how it is lightweight, compact, reflective on one side (silver) and has survival instructions printed on the other. We also show the students how tear-resistant the material is. The material does an outstanding job of reflecting heat and would certainly help prevent hyperthermia. I would recommend this Emergency Blanket be added to the kit of every person that ventures out of doors. *** Manufactures Note *** The review is of an older style Emergency Blanket. The survival instructions are no longer printed directly on the Emergency Blankets in the current style.