Lower body pain in heels, arches, knees, legs - even your lower back - can result from improper arch support and misalignment of your heel and forefoot as you walk. When this happens feet can hit the ground off balance, causing ankles to roll inward and pulling your entire lower body out of alignment. With the same design as our best selling Bio-Balance Inserts, but with a super durable premium leather-like sock liner, Opti-Balance Inserts cradle, stabilize and support your feet as you walk. Under the heel, a special Vari-Wedge works with a biomechanically designed arch support system to help control incorrect foot motion, so your feet hit the ground more evenly keeping your lower body in proper alignment. Specify men's/women's shoe size. Cannot mix sizes for quantity discount.