C-Line, a leading manufacturer of office supplies with a product line that features storage, identification and organization products, offers a range of Green office products for your storage and organizational needs. C-Line Biodegradable 13-Pocket Expanding Files include 12 tabs and incorporate an additional additive that allows them to biodegrade in landfills while leaving no toxic residue. Letter-sized expanding files are the perfect solution for holding, protecting and organizing letter-sized papers and documents. They are made of strong biodegradable polypropylene which is both durable and water-resistant, and feature a drop-front flap closure for easy access. C-Line Biodegradable Expanding Files are not only functional, but makes them a great choice for your organizational needs.