Emergency preparedness - Ready-Heat Torso Blanket

I have a long commute through snowy winter weather. This doesn't take up much room in my car but it's there in case of emergency. The expiration date for the product is three years from now. Tried it out at a recent search and rescue training and it heated up as advertised; don't know if it lasts as long as advertised.

This review was written in the old system and had content requirements that are different than reviews written today.