The Rocketbook Core (formerly Everlast) offers a classic pen and paper experience, yet is designed for the digital age. Although it feels like a traditional notebook, the Core is endlessly reusable and connected to all your favorite cloud services. When you write with a pen from the Pilot Frixion line, your writing will stick to the Core pages just like on normal paper. But add a drop of water... and the notebook will erase all pages as if by magic.