Aetrex Mozaic 2400 Series. Aetrex Mosaic Customizable Orthotics are designed to provide unsurpassed comfort and performance soyou can feel great on your feet at all times. Features a soft, CopperGuard top cover made from advanced copper fibers to help prevent bacteria, fungi and odor.These extraordinary orthotics offer an advanced Lynco arch support to comfortably balance your feet and prove proper body alignment.