The OUTsideIN Backpack is the perfect piece to use as a carryon for your next flight. It has webbing straps like a traditional backpack but has an added feature that makes it perfect to slip over the handles of a roller bag for easy transport through a busy airport. Our backpack is 15" tall, 11.5" wide and 5"deep. We've used the Making Backpack pattern from Noodlehead. It has a large pocket across the front that is 11.5" deep and a smaller zippered pocket on the back. This pocket is sewn so…