The hardcover RocketBook Core Director Spiral Notebook Set is designed for convenience in the classroom, office, or home! The synthetic, white‑lined, college‑ruled paper allows you to write smoothly with the included Pilot Frixion pen, then magically wipe clean with a damp cloth to reuse again! Use the Rocketbook app to blast your notes, plans, lists, and big ideas to your favorite cloud service for proper organization. Then, erase and reuse your Core Director notebook set for your next project!