Heatsheets™ 84"L x 56"W Emergency Blanket by Adventure Medical Kits®. The most advanced emergency blanket on the market - meticulously designed to never fail when you're counting on it with your life. It all starts with the material, 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.