What Makes Aetrex Footwear Different? Aetrex Signature Support & Comfort. Support, coupled with memory foam and adjustability features, makes Aetrex footwear perfect for those who experience pain or spend long days on their feet! Our arch support and comfort features are backed by decades of experience in the medical field. Aetrex Arch Support stabilizes the foundation of your body, helping to make each step less strenuous and more balanced. Kenco also features Aetrex’s patented iStep Foot Scanning Technology in-store. The system quickly identifies your arch type, foot size and pressure points. This revolutionary technology then custom selects the ideal orthotic styles for your particular needs.