Emergency blankets are waterproof, windproof, and resistant to tearing, making them versatile for various situations. They are commonly used in survival kits, first aid kits, and outdoor activities like hiking, camping, or marathon running. Their primary function is to prevent hypothermia by maintaining body temperature in cold conditions, but they can also be used for signaling for help, creating a makeshift shelter, covering the ground as an insulating layer, or even as a protective cover in wet or windy environments. When folded, they are incredibly compact, often fitting into a pocket or small pouch, making them an essential tool for emergency preparedness.