Aetrex customizable Lynco® orthotics are designed to provide unsurpassed comfort and performance so you 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 provide proper body alignment. For medium and high arches. -Cushions rearfoot -Stabilizes rearfoot -Neutral forefoot