Researchers at Nike, Inc. designed Goatek Traction after studying the feet of mountain goats at the Oregon Zoo. Goatek Traction is a shoe sole that mimics the soft,
fatty pad at the center of the goat's foot, the surrounding nail that
digs into soft surfaces, and an articulated toe that allows the animal
to safely jump between narrow rocky ledges. The sole was discontinued after one season on the market due to poor sales, despite it successfully performing as intended.