A thermal blanket is a type of insulating material designed to retain heat. Often made from materials like polyester or mylar, these blankets are lightweight and compact, making them easy to carry. They are commonly used in emergency situations, outdoor activities, and by hikers to provide warmth and protection from cold weather. In addition to their use in emergencies, thermal blankets are also popular in medical settings. They help maintain body temperature for patients during surgeries or after trauma. Their reflective properties can also be beneficial in survival situations, as they can help conserve body heat and prevent hypothermia.