These men's adidas Response Boost Techfit running shoes feature techfit technology for lightweight, flexible support.SHOE TECHNOLOGIESHeel counter and midfoot chassis provide optimized fitEnergy-returning boost foamMoisture-wicking liningEVA sockliner promotes anatomical fit and solid step-in comfortSHOE CONSTRUCTIONtechfit upperFabric liningEVA midsoleRubber outsoleSHOE DETAILSLace-up closurePadded footbed