The Mart Cobra Thermal Emergency Blanket is a set of four silver Mylar blankets measuring 52x82 inches each, designed for use in emergency situations while backpacking, camping, or hiking. These blankets provide thermal insulation to help retain body heat in cold weather conditions, making them a reliable and essential item to include in outdoor gear. With a shiny silver color, these blankets are easy to spot and can be used to create a makeshift shelter or signal for help in case of emergencies.