An elastic bookmark and pen holder for book or binder. Protect your precious text with our colorful Notebook Belt. This durable elastic strap keeps your book, journal, agenda or binder securely shut. Always keep your pen nearby—the Notebook Belt is equipped with an elastic pen loop that can fit any writing utensil up to 1/2-inch in diameter. (Good news for Levenger Lap Desk owners: You can use these as lap desk replacement straps, too.)