The collection Barcelona is the most sustainable collection. These leathers are eco-certified as well as Oeko-Tex certified! Here, we source the raw hides from certified eco-farms. The collars, leashes and harnesses are produced in the most ecological and environmentally friendly way. With the embossed serial number, we can guarantee a full transparency of the production process. By tanning the OLIVVIA leathers with an extract from olive leaves, they are also extremely allergy-friendly. This is unique!