Space blankets, also known as emergency blankets, are lightweight, thin sheets made from a material called Mylar. They are designed to reflect body heat, helping to keep individuals warm in emergency situations. Originally developed by NASA for use in space missions, these blankets are now commonly used in outdoor activities, first aid kits, and disaster preparedness. These blankets are compact and can easily fit in a backpack or pocket, making them convenient for hikers, campers, and emergency responders. They are also waterproof and windproof, providing additional protection against the elements. Their reflective surface can also be used for signaling in emergencies.