More compact lightweight design features a quieter more durable polyetheline material. Reflects 90% of your body heat. Fits one person. The most advanced emergency blanket on the market starts with the material vacuum-metalized polyethylene 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.