The ROCKETBOOK Cloud Cards are eco-friendly reusable index cards made in the United States. Featuring a sleek white color and designed with the Model Cloud Cards, these cards are perfect for keeping track of important notes and ideas. Included with the purchase is a FriXion Pen with a pen ink that is durable and does not bleed through the pages. With the ROCKETBOOK brand known for quality and innovation in office supplies, these Cloud Cards offer a convenient and sustainable solution for all your note-taking needs.