Panama hat miners of the California Gold Rush traveled to California via the Isthmus of Panama and Pacific Mail Steamship Company. In 1906 , U.S. President Theodore Roosevelt visited the construction site of the Panama Canal and was photographed wearing a Panama hat, which further increased the hats' popularity. Although the Panama hat continues to provide a livelihood for thousands of Ecuadorians, fewer than a dozen weavers capable of making the finest "Montecristi superfinos" remain. Production in Ecuador is dwindling, due to economic problems in Ecuador and competition from Chinese hat producers. The tamsui hat was a straw hat made in Formosa
Six Thinking Hats method—a set of tools corresponding to all six thinking hats—first appears in his CoRT Thinking Programme in 1973: Having identified the six modes of thinking that can be accessed, distinct programs can be created. These are sequences of hats which encompass and structure the thinking process toward a distinct goal. A number of these are included in the materials provided to support the franchised training of the six hats method; however it is often necessary to adapt them to suit an individual purpose. Also, programs are often "emergent", which is to say that the group might plan the first few