A special, Grey Days edition of the 1906R expresses a balance of past and present, inspired by the timelessness of stone structures in nature. The high-tech heritage design, featuring a jacquard style knit mesh upper, curvilinear synthetic overlays, and a combination ACTEVA LITE, N-ergy is outfitted in grey tones and features a series of distressed details. A combination of subtle cracked effects and markings create elegantly weathered appearance, worn better with time.