Unmatched Heat Resistance: The Mylar foil construction gives this emergency aluminum blanket remarkable heat resistance, conserving body heat during winters and reflecting heat when necessary. Exceptional resilience: Though thin and lightweight, this heavy-duty mylar blanket is highly resistant to tears and punctures, ensuring durable protection and comfortable use. Waterproof and Windproof: Besides offering superior insulation from cold air, the Medbec Aluminum Blanket also offers reliable protection against the elements, so you stay dry and sheltered in unpredictable weather conditions. Lightweight and Compact: Individually bagged, each mylar foil blanket is folded into a compact size, allowing you to store multiple pieces in your first aid kit or 72-hour kit. Versatile Use: Whether you are camping, hiking, or experiencing a vehicle breakdown in a cold location, this blanket serves as an excellent emergency tool to shelter you and also serves as a signal for help with its highly reflective surface.