The All-Weather Notebook will survive rain, sweat, mud, and snow. The Forest Green durable cover defends your notes, secret codes and sketches from scratches and stains. We added rulers to the back and standard/metric conversions so you may track your observations. All-weather paper won’t turn to smush when wet and will repel water and even survive the accidental laundry mishap. When paper is wet, use a classic No. 2 pencil, ballpoints and permanent markers will work when paper is dry.