Designed for marathon performance, the Alphafly 3 features three integrated technologies. A double Air Zoom unit provides energy return, while a full-length carbon fiber plate assists with propulsion. A heel-to-toe Zoom X foam midsole ensures a responsive ride. two forefoot Air Zoom units Zoom X foam midsole full-length carbon fiber Flyplate Atomknit upper notched laces integrated knit tongue with lofted padding fits small, recommend ordering a half size up
