Turn oven to lowest temperature setting. Mine is at 170°F.
Mix pumpkin, water, cinnamon and sugar in a blender until smooth. Taste to decide if you need more sugar. The consistency should be thick, but you should be able to pour it out and spread across a Silpat mat. If your mixture is too thick, add a little more water and blend again.
Pour mixture onto Silpat mat and spread evenly across so that it's a thin layer laying on top of the Silpat sheet (a little more than 1/8 inch thick but less than 1/4 inch). Bake for about 6 hours or more until fruit leather is dry. After it cools, you can cut and roll up with sheets of parchment paper.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.