Organized Up Stackit Organizer is great for organizing presentations and projects, especially when you're on the go. Three 5" high pockets hold up to 50 sheets each. The organizer features linen stock and tabbed dividers that allow labeling and subdivision. The tuck flap secures your letter-size documents in place along with the closed sides. The vertical orientation makes it easy to access documents and is backpack-friendly. Organizer is made from archival, acid-free material.