Vacuum-metalized polyethylene, that reflects 90% of your body heat while also offering a number of other important features that set it apart from traditional mylar blankets; it opens easily and will not shred if nicked or punctured, rips and tears can be repaired, it is quiet and won't crinkle in high winds, and its high-visibility orange exterior makes it easy for rescuers to find you. Sized to fit one person. SIZE: 56" x 84"Specifications and Features: Depend on the most advanced emergency blanket on the market, meticulously designed to never fail when you're counting on it with your life. Made from vacuum-metalized polyethylene Heatsheets, it reflects 90% of your body heat to help you stay warm. More durable than Mylar, this blanket resists tearing and will not shred like Mylar blankets if nicked or punctured. A true ultra-light multifunction backcountry tool, this emergency blanket can also be used as a ground cloth, gear cover, first aid blanket, and more. This pack includes a 56 x 84 emergency blanket that weighs only 2.5 ounces. Shelter yourself from the elements with the Heatsheets material that is windproof and waterproof.