As the name would suggest, SPEEDFACTORY innovations are present throughout. Adidas worked closely with a group of runners who provided insight to fine-tune this running shoe, with the result being this stylish, highly engineered model created at their SPEEDFACTORY in Ansbach, Germany. This shoe is about as ground-breaking as it gets. The design was crafted using athlete date for a fit and feel which is unrivalled in terms of performance footwear. This is neutral shoe promising versatility across most terrains and enough flexibility for the amateur and professional runner alike. Even if you’re not planning to rack up the miles in the AM4, this silhouette offers some serious street appeal. Aside from the impressive performance attributes – including Boost and the floating torsion bar, this shoe holds a secret. An NFC chip sits in the tongue enabling a special experience for any accessing via their smart phone.