The metalized material on the silver side of the blanket reflects your radiated body heat back to you and traps it close to the body for warmth. The impermeable material holds in the heat that would normally be dispersed into the air.
Among countless other uses, our emergency blankets can be used as a ground tarp, trail marker, rain poncho, emergency signal flag, arm sling, rain fly for gear, and emergency lean-to shelter.
At 2.5mm thick, the Heavy Duty Emergency Blanket is 2x stronger and more durable than the basic Emergency Blanket. It is also larger (58” x 98” vs. 56” x 84” Emergency Blanket). Finally, the Heavy Duty Blanket is green.