Art Supplies Design Pocket Refillable notebook by Ari Korolainen Pocket is a convenient and sustainable notebook for everyday use. The cover is made of recycled leather, which is a durable material. The notebook insert is changeable, so when you run out of pages you can easily replace the insert with a new one, keeping the old covers. This way the notebook will stay with you for many years. The notebook consists of three pieces: the cover, a cardboard page marker and a notebook. All pieces are held together by a rubber band, which also closes the notebook.The notebook comes with a small pen attached to the cover, and is available in many color combination.