What is the difference between the Kork and the Kork-Vac?
Superfeet Kork is a little thicker in volume and will take up more room in the boot. The Kork full-length top sheet is molded from a 3/16″ thick sheet of Kork. This makes the product a little denser and offers a little more support. The Kork-Vac full-length top sheet is molded from 3/16″ foam. Because we’ve chosen to use foam full-length it takes up less room in the boot and offers a softer ride.