they belong to the sustainable brands now from munich sebastian teases the 4 found his family has been in the shoe industry for 6 generations but even for him working with stones was. one of them if you want to. hundreds of millions of years old all natural and each pair is unique. technically speaking it isn't superior to leather because some of the shoes are a bit less robust so you shouldn't wear them in siberia at minus 40 degrees celsius but they're perfect for normal day to day purposes. the process of making flexible . starts with huge blocks of marble. using a special technique very thin slumps is sold off. onto a flexible material. to make it was invented based company. if you can if you. don't becomes flexible if you make it very very thin we're talking less than one millimeter thick and then combine it with something stabilizing the. trigger that can be fiberglass or cotton fleece. or will stabilize the slice of stone and hold together the stone particles even when the slab gets bent. alternately to make more flexible. but that is a trade secret. by the end it can even be st