Hi-Tec Ad Pro Indoor Sports Shoes fabric-and-leather Comfort Tec Footbed - The Hi-Tec Comfort Insole is designed with a moulded heel cup to improve posture, and supporting the arch and heel for optimal comfort whilst on your feet. Rubber Gum Outsole - Designed to ensure that marks aren't left through a rubber gum technology. PU, Mesh and Nuback - The Upper design is made to help stability for the wearer by keeping the foot in place, as well as giving them comfort.