Samsill Earth's Choice Biobased Storage Binder, 3 Ring Binder, 1.5 Inch, Round Ring, Black 3 ring binders combine biobased and recycled properties that offer a perfect balance of sustainability benefits that meeting the needs of any school or corporation looking for ways to reduce their carbon footprint Three ring binder is composed of at least 69% biobased material including polypropylene cover made with 25% plant based renewable polyethylene material USDA Certified Biobased Product Chipboard is made from 100% recycled material PVC free  acid free and archival safe Binders 3 ring 1.5 inch ring mounted on back lid so pages lie flat and to reduce the wear on paper