Recommended by doctors and pedorthists world wide, the New Balance Orthotics NB 405 insole is tri-density with a molded Pedic™ core to support the arch and provide maximum comfort. The NB 405 has a cupped rearfoot for cushioning and stabilization, recommended for medium and high arch feet; a supported forefoot for those seeking metatarsal support to comfort ball-of-foot condition. Top cover features X-Static®, a fiber made with pure silver for an improved antimicrobial, anti-odor and thermodynamic natural performance.