Use any Pilot Frixion pen, marker, or highlighter to bond the ink to our specialized pages - just wipe clean with a damp cloth to start over. Includes 1 Rocketbook Core Executive Size Digital Notebook, 1 Pilot Frixion Pen and 1 Microfiber Cloth. 36 ruled pages. 6 x 8.8 in. Sold by each. Midnight blue.