The new XC-72 pushes its classic sources of inspiration even further into unexplored territory, with a time-bending design inspired by the speculative technological optimism of 1970s concept cars. Three distinctive traction outsole patterns and angular features are employed to give the familiar low-cut sleekness of the era’s running shoes an aggressive, experimental edge. The XC-72 is the future that the past dreamed about, come to life. 5.