The uncompromising, durable build of Heavy-Duty View Binders with Extra-Durable Hinge is enhanced by clear view covers and spine. Featuring Wilson Jones strongest covers and made of Wilson Jones custom-formulated, PVC-free polypropylene, these binders last up to 10 times longer than ones made of vinyl and are better for the environment. Heavy-duty binders also feature never-gap rings for secure and snag-free paper storage. Three never-gap round rings provide spill-free document security. Customizable cover and spine simplify binder labeling and personalization. Two interior pockets provide space for additional documents.