FREEDOM AliCork Orthotic is the firmest member of the FREEDOM Half Sole family. AliCork is a heat-moldable, thermoplastic cork composite that is often posted and topped in the office with a sheepskin skiver. You can modify AliCork by gluing, grinding, drilling or heating. AliCork Insoles are generally used as a component in a more elaborate orthosis. Weight capacity: approximately 300 lbs.