This Silver Emergency Blanket is an ultra-compact 3" by 4.5" by 3/8", but opens up to a generous size of approximately 59" by 87". Most commonly used for emergency first aid and wilderness survival, these little wonders are capable of a multitude of other uses making them perfect for 72 hour and first aid kits! The blankets are a metalized plastic sheet, which can help prevent or treat hypothermia, act as a windbreaker, and can be worn as an emergency waterproof wrap. Importantly, their reflective property makes them easily seen from a distance, so use your blanket as an emergency signaling device. Since they reflect up to 90% of radiated body heat, they are also widely utilized in non-emergency situations as body wraps to keep athletes warm after a marathon or other sports activity. For these reasons, emergency blankets are indispensable and used by hikers, emergency response teams, and disaster agencies.