I wanted to have light, leather, designed just for me shoes. So I had to make them.
On picture you can see first version.
Materials:
Leather, hard one, and thin one.
Sponge.
Cardboard.
Glue.
Rubber.
Velcro tape.
Friend with Sewing Machine.

Step 1: Draw, Cut, Glue

Draw sole design on cardboard and cut it. Glue sponges.
Use scissors for sponge, scalpel for cardboard holes.

Step 2: Leather-ing

Draw a shape of sole on leather, apply glue. Watch your hands.

Step 3: Glue, Cut

Glue leather carefully. Cut surplus, but leave one inch around.
After cutting, glue around.
Stretch a leather around the cardboard.

Step 4: Sew (option)

Sew around edge.
Also you can sew around cushions, but, not necessary. I did it, but I recommend it not.
All you have to do is cut holes on leather, and glue it for rubber sole.
But watch out, first add leather stripes and glue them from the inside to cardboard..

First version of sandals had no cushions, and no threads.
You can do it with no cushions, same instructions.

Step 5: Leather Stripes, Conclusion

This leather is little bit harder, and edges are sewed.
Joint of adoptable stripe is made with Velcro tape.

(note: version 1.0. on this pictures)

Version 1.0 Vs. 1.1.
Version 1.0 is more comfortable than V.1.1. also durable and easier to make.
Version 1.1. looks better.