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. and ABZORB SBS sole unit. 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.