The Frankie Roadside features HPO2Flex, which provides the ultimate in cushioned comfort. The unique triangle design offers multi-directional flex capability, conforming to the way you walk. It is made with distressed trim linings, an unlined forepart, and strobel construction. The HPO2Flex footbed with EVA heel cup provides exceptional cushioning and comfort. The cupsole outsole features a sawtooth tread design element.