Corthay has come up with a new leather to use that I don't believe has ever really been utilized in the high end shoe industry (not at least in the modern era),
The Shoe Snob
The World's Foremost Authority on Fine Footwear
The Shoe Snob Blog is the world’s foremost authority on fine footwear. Founded by Justin FitzPatrick. Want to learn about good shoes? You came to the right place.