Aetrex Customizable Orthotics are designed to provide unsurpassed comfort and performance so you can feel great on your feet at all times. Features a softm CopperGuard top cover made from advanced copper fibers to help prevent bacteria, fungi and odor. These extraodinary orthotics offer an advanced Lynco arch support to comfortably balance your feet and provide proper body alignment. Controls over-pronation and balances rearfoot. Recommended for flat feet or low arch. Without metatarsal support for those not suffering from ball-of-foot discomfort.