4) A comfortable footbed
When the upper is completely ready, we attach it to our footbed. We grap the end of the upper and pull it through the holes of the leather footbed. Then, we use a last to ensure the sandal has exactly the right measurements. We use super strong glue to stick the ends to the bottem of the leather footbed.
We use leather for the footbed to make sure you will have ultra comfortable sandals. After a while, let's say when you walked for 7 miles on your sandals, you mark your own footprint into the leather footbed and your sandals will support you exactly where your feet need some support. Everyting gets better over time.