Grizzly Gear Emergency Thermal Blankets - Mylar Weatherproof Disaster Preparedness Survival Blanket - Designed for NASA - Multi-Functional for Camping, Hiking, Hunting, Marathons, First Aid and More Emergency Blanket - Provides insulated thermal emergency protection in all weatherproof conditions. Mylar Emergency Blankets - Made of durable insulating Mylar material designed by NASA for space exploration. Space Blankets - The blankets can help you retain 90% of your body heat and keep your body from going into shock. Thermal Emergency Blanket - Compact and lightweight the blanket pack can be kept in your hiking pack, auto, home, boat, RV, or emergency shelter. Dimensions: Standard Size 52" x 84"