This 6 x 9 notebook is a dual layout planner. The main page in this book is divided into two parts. The top half has short prompts which allow you to make short notes about your sleep and factors that may influence your sleep, while the bottom half can be colored in like a bar graph to help you visualize how much sleep you get per night In addition, one blank page with lines to make further notes about your day, what happened that might have had an influence on how much sleep you got and the quality of it. Keeping track of how much sleep you get can be useful for many that struggle to sleep. Tracking it can be useful information to yourself and your doctor or other medical personnel that you visit. It's much more useful to have numbers than "I don't sleep much" or similar.