The case-it d-146 mighty zip tab zipper binder is an efficiently-designed 3-ring organizer with a five-color, tabbed expanding file folder. This large-capacity binder also features a gusseted zipper for easy access plus a carry handle & shoulder strap for versatile mobility. The zipper has a unique angled design to make it easier & quicker to zip things up when packed with your important papers & materials. The d-146, like all of case-it's binders, uses kraft board instead of pe board to give its binders a firm, stiff shape that won't buckle or warp. The spine is specially designed so that your binder can lay flat when open, making it easier to add or take papers out, & to take notes in. Case-it produces quality binders offering unique organizational tools for school or home use.