Apex X801 Lace Walker X-Last Walking Shoe (Women) - BlackWomen's Lace Walker X Last is designed specifically for those with a moderate to excessive amount of overpronation when they run or walk, usually those with low arches or flat feet. With X Last shoes, a molded external heel counter that extends around the heel to the arch works in conjunction with an internal heel counter to provide superior motion control and maintain the foot in a neutral position during each step. Doctor recommended designed that