Heavy-duty view binder features an extra-durable hinge and is made of custom-formulated, PVC-free polypropylene. Uncompromising, durable build is enhanced by clear view covers and spine. Polypro binder is more eco-friendly than vinyl binders and lasts up to 10 times longer. Three never-gap round rings provide spill-free document security. Clear view covers and spine allow quick, easy binder customization. Easy-to-use templates for customizing your front cover and pages are available. Two interior pockets provide space for additional documents.