Fireproof and Water-resistant: The multi-Layer rolling fireproof file box is made of 3 layered non-itchy silicone coated fibreglass which stands up the temperature up to 2200℉.The file lock box is fireproof and waterproof, which can effectively protect your important documents in a fire, flood, and wet weather. They will further keep your files intact. Nothing is completely foolproof, but added protection is always a good idea.