Natural disasters are unpredicted events that can happen anytime and can leave your family without a roof and wamrth. Prepare yourself with the N-Rit Wind & Waterproof Lightweight Emergency Blanket. Weighing at only 40 grams, the emergency blanket is made of aluminized polyester that can be easily stored in emergency kits, cars, and drawers. The material reflects heat back to your body so you will always be warm.