Made of puncture resistant mylar material ,The material retains 90% of your body heat,emergency blanket poncho is durable, tear-resistant, waterproof, windproof, thermal and quiet. Ultralight and Portable£ºWeighs only 0.19lb, 40×49 Inches , large enough for most adults with backpack and easy to get on & off. In addition, we are equipped with a separate storage bag, which is convenient for you to carry at any time.The survival blanket can also be used as a backpack cover, rain poncho,