1. Protect yourself from hypothermia in emergency situations - The thermal mylar emergency blanket can retain/reflect 90% of body heat in the event of an accident, avoid body temperature dropping. It is ideal for camping, hiking, marathon running, boating, fishing, exploring and other outdoor exercise. Foil covers are also essential for home/automotive emergency kits. 2. Reflect light to attract the attention of rescue personnel: The premium space blanket can reflect light under any light source, it will increase the chances of user recusal. In addition, our emergency blankets can absorb heat from the outside air and reflect back to the user's body. 3. Lightweight and Compact - It contains 5 pieces of silver survival blanket, each gold survival blanket is individually packed in its own zipper package. It is ultra-thin, light and compact, when folded it is about the size of a deck of cards and therefore easy to carry. Store in a car, RV, boat, or gear bag for emergencies, or use after marathons or a sporting event. 4. Made from the best weatherproof material - Insulating mylar is waterproof foil and retains or deflects heat. The Mylar insert provides insulation and the foil cover can reflect heat back to the body or divert heat from the sun. Protects you from cold, wind, weather and hypothermia. 5. Large size provides full coverage: The size of each emergency blanket is 210cmX160cm (83''X63''), the color is shiny silver (two sides). It is small and portable when folded.c