The Corefit Story

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A Corefit “Original Miracle Device” advertisement, circa 1939


“The self-imposed standards at our family owned company are exemplified by the passion applied to our hand-finishing.”

In 1932, J.D. Zinke, the late founder of the Zinke Shoe Company, made custom shoes the way they were made in Germany…”with contoured insoles, formed to fit the foot.” Unlike factory-made shoes, which had flat insoles, thus leaving one feeling as though they were walking “on soft earth” instead of pavement. Then, Mr. Zinke thought, “Why not manufacture an individual custom insole that can be inserted into a standard type shoe, giving its wearer the comfort that is only derived from expensive custom-made shoes?”


He and a group of specialists then developed a perfect, custom moldable insole which also turned out to be a revolutionary foot support. You’ll notice we didn’t simply say “arch support”…because it was actually a complete foot support. It supported the weight bearing areas of the foot…both cradling the heel and supporting the longitudinal and metatarsal arches; providing solid comfort and relieving many foot disorders. The end result, coined the “Miracle Device” was thus born: a custom moldable insole that when inserted into the shoe turns out to actually be a superior foot support, doing the job far better than most molded orthotic devices custom fitted by podiatrists that sell for $300 and upward. Up to now, his discovery has been sold exclusively to podiatrists, medical professionals and the US Military. We believe that while we are at the forefront of developments in orthotics, many tasks are best done by hand. Fortunately, as a family owned company, we’re able to nurture and preserve the traditional and complex hand-finishing skills that make our custom moldable orthotics so unique. These self-imposed standards culminate in our only product: The Corefit Heat Moldable Orthotic Insert.