ecopybook tactical notebook of an intelligence agent 8194This is a reusable notebook, designed to withstand adverse weather conditions and heavy use. Notes can be easily erased when needed, while the outlines on the pages remain intact. The notebook is also fully waterproof. For writing, the manufacturer recommends using a graphite pencil with "HB" hardness. Colored pencils and ballpoint pens can also be used. To erase notes, an eraser can be used; if it's unavailable, wet sand or soil mixed with water can