Invented in the mid-19th century by Charles Goodyear, vulcanisation involves stabilising raw rubber by adding sulphur. After heating and/or compression, the vulcanised rubber part is UV-stable and has elastomeric properties. After mechanical stress, which can deform it up to several times its size, the material is returned to its original dimensions and desired shape.

Since 1963, we have developed a unique process called "direct vulcanisation" which consists of vulcanising the sole and the upper of the shoe in the same mould. Thanks to the closing pressure of the mould, the rubber penetrates naturally into the fibres of the upper fabric, thus avoiding the use of adhesives and solvents. The implementation of this manufacturing process requires the design of specific moulds.