m tac ecopybook tactical an all weather notebook fireteam squad 8630The Ecopybook Tactical Notebook is a durable, all weather A5 notebook that easily fits into any pocket and is designed for use in extreme weather conditions. The cover is made from a matte, anti glare polymer, while the pages are made from synthetic materials that are both water resistant and oil resistant. You can write on the pages using regular pencils. To erase your notes, you can use an eraser, or if you're outdoors, you can use wet sand or earth