Reebok ZPrint Run shoes provide fluidity of movement with adaptive fit and flexible materials. Uniquely designed upper forms to the foot without restriction and flex grooves in the outsole allow for quick turnover during the run. Runners will also enjoy flashy reflective accents that enhance visibility while running in low-light conditions. Upper: Upper made of Tri-panel textile material for lightweight comfort. Knit webbing at the midfoot for an adaptive, yet stable fit. Flat laces reduce irritation.Midsole:Decoupled midsole with flex grooves enhance natural and dynamic motion. Outsole: Uniquely spaced lugs provide flexible movement for an adaptive ride. Dense foam along outsole perimeter provides stability and traction.