Environmentally friendly binder features a polypropylene cover formulated to biodegrade in microbial landfills within five years verse the hundreds of years it takes normal plastic. This binder is completely reusable with an unlimited shelf life andwill not start to biodegrade until disposed of in a landfill. All contents are 100 percent recyclable. Overall binder contains a high percentage of recycled material. Archival, acid-free, environmentally safe polypropylene will not lift copy. Designalso includes traditional metal round rings mounted on back lid so pages lie flat and two clear inside pockets for storing additional loose papers. Customize the exterior of this binder with the clear overlay covers.