3-d printable boat shoes

It is designed to fit U.S. men's size 9 feet. This file is not perfect yet. Some tweaking is required to print it out correctly. Suggest printing the top and bottom part of each shoe separately. Also it should be printed in soft filament to be wearable (hasn't been tested yet, wear at your own risk!). Once printed, the top and bottom part can be tied together with cotton or nylon string.