The Passier synthetic saddle tree is made of an elastomere which was tested under space conditions. Its development and further refinement are a core element of Passier research. A saddle tree made of this synthetic material cannot break under normal conditions and can therefore respond successfully to the highest demands. Passier saddles with the synthetic saddle tree are available in sizes from 15.5" to 18", with a ten-year warranty on the saddle tree. As every saddle with a synthetic saddle tree is a unique product from a master saddler's hand made in Germany, it is possible to combine a saddle in one size with saddle flaps in another size.