This is the "EKIDEN PACK" colorway of the Nike Air Zoom Alphafly NEXT% thick-soled racing shoes. Nike Air Zoom Alphafly NEXT% (DC5238-702) This model, released as part of the 2021 "Ekiden Pack," features a design inspired by the Ekiden, a traditional Japanese New Year's relay race. 1. Design Features * Colors: Volt (fluorescent yellow) / Racer Blue / Black. * Graphics: The Swoosh (logo) incorporates a **topographical map (contour lines)** that evokes the courses around Mount Fuji, giving the shoes a special feel. 2. Key Technologies * ZoomX Foam: Nike's lightest and most responsive midsole ever. It boasts overwhelming energy return. * Two Zoom Air Units: Visible air layers in the forefoot provide explosive responsiveness. * Full-Length Carbon Fiber Plate: Smooths foot transitions and generates high propulsion. * AtomKnit (Upper): An evolved version of Flyknit, this ultra-lightweight material minimizes water absorption while balancing breathability and fit. 3. Basic Specifications | Item | Details | |---|---| | Weight | Approximately 210g (per shoe, 27.0cm) | | Drop (Offset) | 4mm | | Sole Thickness | Approximately 39.5mm (close to the World Athletics regulations limit) | | Main Uses | Full marathon, road races (aiming for personal bests) | | Release | 2021 | Main Differences from Metaspeed Sky (Asics) * Cushioning: The Alphafly has a thicker sole, and the "bouncy sinking and rebound" provided by Zoom Air is more strongly felt. * Stability: While the Asics Metaspeed Sky has a relatively flat ground contact for easier stability, the Alphafly tends to require more skill (higher cardiopulmonary capacity and leg strength) to master. This model is currently sold out on the official website and is mainly available through secondary distribution (flea market apps and specialty stores).