The Case-it “Z” Zipper Binder keeps you ultra-organized at school. The Z binder features an innovative 2-in-1 design that keeps important documents and items organized for easy reference. The “Z” shape features interior and exterior pockets on both sides to double your storage capacity. Use this specialty binder for holding notebooks, pens, calculators, rulers and more. Each section has its own set of 1.5″ D-rings that each hold a 250 sheet capacity, for a combined total of 500 sheet capacity. The durable zipper closure is ideal for keeping your documents safe from falling out or getting damaged. Conveniently the gusset is made with a ripstop material that keep tears from spreading. Does your student want to seperate their subjects by class periods? The two-sided design allows students to use each side for specific subjects – giving the student the freedom to get organized how they want. For transporting to and from class use the handle or shoulder strap provided.