The Case-it 1.5-inch binder has two separate sets of rings, for a total storage space equivalent to a 3-inch binder, but separated for faster page reference. It includes two hold-down pages to keep paper from blowing over and interfering with writing. This practical Case-it "The Dual" 1.5-inch zipper binder closes completely to protect the contents from wind and rain.The Case-it D-ring binder comes with two Velcro pages that act as paperweights to keep sheets from catching in the wind, and they also double as storage for protractors, pencils, erasers and other essentials. Its shoulder strap and handle make the binder easy to carry. The gusset lies flat when its open so users can write on the papers in comfort.The Case-it 2-in-1 binders rugged exterior cover utilizes Ripstop material with tightly woven square cells that prevent tears from spreading. Its waterproof to keep rain, snow and any other inclement weather from damaging important documents. A strong, fully-zippered gusset closes the binder up to prevent any loose items from falling out.