We spent the last two days after classes learning to make a traditional Japanese shoe. They are made by hand to be about a centimeter too small for your feet, and are generally worn with kimono. We made ours using only rope, some foam-like tubing, fabric, our own hands, and a sort of wooden needle just for pulling fabric through in loops.
Weaving strips of fabric into the rope, nice and tight for a firm foundation.
About to attach the straps, using the foam tubing.
The straps have been woven in!
All I have to do is attach the strap where your toes go around.