Biodegradable binder is made using an all-natural organic additive from Bio-Tec Environmental so it biodegrades in one to five years time versus the thousands of years it takes normal plastic. Binder is completely reusable with unlimited shelf life and will not start to biodegrade until disposed of in a landfill. All contents are 100 percent recyclable. Archival-safe, environmentally friendly polypropylene will not lift copy. Overall binder contains more than 47 percent post-consumer material, and chipboard is made from 100 percent recycled material. Clear overlay on spine, front and back covers lets you create customized high performance presentations. Locking Angle-D rings open and close with one easy touch and tightly secure documents while holding 25 percent more sheets than standard round rings. Two clear pockets store additional loose papers. Binder holds letter-size sheets.