Our 4.5/8" x 7" Side-Spiral Notebook is a medium-sized field companion tough enough to survive the onslaught of Mother Nature. This scrappy notebook will survive rain, stains, and wear-and-tear from daily use in the field. Impact-resistant Wire-O binding won't lose its shape under duress, and a Polydura cover defends your notes from scratches and stains. A table of contents keeps your notes sorted, and handy rulers on the back cover prove handy in a pinch.