Engineered for marathon performance, the Alphafly 3 incorporates three distinct technologies to support long-distance running. Dual Air Zoom units provide energy return, while a full-length carbon fiber plate assists with forward propulsion. A Zoom X foam midsole offers cushioning throughout the entire stride. two forefoot air zoom units full-length carbon fiber plate zoomx foam midsole atomknit upper notched laces integrated knit tongue with lofted padding