The L425 is light-weight, resilient and provides unmatched support and stability. Made with CopperGuard?â'?é?« cover with advanced copper fibers to help prevent bacteria & odor build up. These unique orthotics are designed with a posted heel to gently realign the rearfoot and control over pronation. This style also has a metatarsal support to help offload forefoot pressure. Recommended for flat and low arch feet.