The "Thin Blue Line" Notebook serves our community's men and women in uniform. Designed to meet strict requirements for evidence gathering, the "Thin Blue Line" Notebook is a professional's tool. It is fully weatherproof to save vital case notes from the elements. It fits easily into any uniform pocket. It features permanent binding and numbered pages to prove sequence for valid testimony. A small evidence ruler on the back cover can act as a photo scale. If you work in law enforcement, this is the pad you'll want to have in your pocket when you have something important to note.