Review on Essential Mylar Thermal Blankets: Buy in Bulk for Emergency Situations by Matt Watson

More durable material and less expensive than what you'll find in the camping department. Received pack of 10. I pulled one out to test and it performed better than the cheapest at Walmart ($3.99). Gold on one side, silver on the other. Bonus: For a dollar, you don't feel bad just using it once. Putting it back in my pocket requires skills I don't have.