Hermann Oak® Leather Co. was started by Lewis Charles Hermann in St. Louis, Missouri in 1881 to serve the local harness trade. Three more generations of Hermanns have followed in Lewis’s footsteps to bring the finest quality vegetable leathers to market. The tanning process has not changed much through the years. They still use the finest natural tree bark in their tanning liquors for richness and texture. And, each side is soaked in ground-vats and hand-worked for smooth, consistent and firm results.