Unfortunately, most of well-known rubber soles are made of synthetic rubber, i.e. synthetic oils and petroleum derivatives. In our Vegan&Bio collection we decided to use only natural rubber, and produce two types of soles.
Lactae Hevea
See our Eretz sneaker’s soles - they are made from natural latex from the Lactae Brasilensis tree. For its production, trees are not cut down, but their bark is gently cut to obtain the "milk" produced by them. It’s a very sustainable process: sourcing liquid latex follows the natural cycle of the tree. Only an average of 50g of milk can be harvested per day, so in order to obtain material for the production of one pair of soles, collecting it from one tree would take 20 days. This is a slow and natural process by which the trees are replenished all the time, but also allowed to regenerate. Botanists believe that "dropping" the milk of the rubber tree has
a positive effect on increasing its strength and natural protective barrier.
The soles themselves are made in a small manufacture in the south of France that revived
a long-forgotten rubber processing 40 years ago. This is where our extremely soft and flexible soles are created. The production of the soles is completely manual - they are all hand-made. In the entire manufacturing process, no ingredients other than rubber are used, so used soles can be composted.
Natural crepe rubber
Crepe is not much different from Lactae Hevea soles. It all starts with the same rubber tree, but instead of pouring latex milk straight into the moulds, liquid latex is subjected to mechanical and thermal processes, giving the material slightly different properties and a characteristic rough texture. This is how the comfortable and durable soles of the Opera, Kemet and Ali vegan models are created.
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