Paduka: https://en.wikipedia.org/wiki/Paduka
Link, The World's First Flip-Shoe: https://www.indiegogo.com/projects/link-the-world-s-first-flip-shoe
Chopine: https://en.wikipedia.org/wiki/Chopine
Mini Museum's mask straps and donation info: https://shop.minimuseum.com/collections/accessories/products/3d-printed-ear-saver-strap-for-elastic-masks-tension-release