Fueled by stories of harrowing slips and falls, Sherman, the founder of Korkers, set to work carving soles and straps from old tires. He then stapled the pieces together into a lace-up overshoe. Sharp carbide studs completed the prototypes, giving the loggers indispensable traction on slick wood. To this day, Sherman’s ingenious invention stands as a massive innovation that saved an untold number of lives.