A survival blanket, also known as an "anti-cold blanket", is a light and compact survival blanket, usually made of foil or other material with a reflective coating. It helps to keep warm in cold conditions, protecting against wind and moisture, and can also be used as a signal tool thanks to its reflective surface. A survival blanket is often included in survival kits or useful for people who are engaged in hiking, mountaineering, hunting and other outdoor activities.