WATERPROOF: Duracopy is an extremely durable synthetic paper stock created for use in the harshest conditions, even prolonged use under water. 100 sheets of white (4.7 mil) copier paper per pack.PRINTING: Laser print your own forms, charts, maps, worksheets, and important documents on DuraCopy waterproof paper. Printed toner won’t rub or wash off. Printable on both sides. Because Duracopy is heat-resistant, there’s no risk of melting in your machine. Ideal for use in laser printers, such as: HP, Brother, Lexmark, Canon, Epson, and Xerox. Not for inkjet printers.DURACOPY: When wet, use a standard #2 pencil an all-weather pen. Standard ballpoints and permanent markers will work when paper is dry. Water-based inks will bead or wash off DuraCopy.TEAR RESISTANT: Duracopy resists tearing but it can be cut, perforated, or hole punched like standard copy & multipurpose paper.RECYCLABILITY: In spite of Durcopy's 100% waterproof durability, it can be recycle at any residential or commercial facility that accepts ‘1-PET’ classification materials.