Emergency Blanket uses durable insulating mylar material which reflects and retains back up to 90% of body heat to keep patients warm. ME1709 Mylar Emergency Blanket is waterproof and windproof and provides all weathers emergency protection. ME1709 Emergency Rescue Blanket provides the life-saving warmth and is available in gold and silver color. Emergency Thermal Blanket fits in a pocket and is ideal for ambulance, police and fire units that must work outdoors in all types of weather.