The woven FitKnit fabric in the upper of Skechers GOrun Bolt running shoes offers an incredibly flexible fit with a smoothness that will cover your feet in luxury. Repositioned GOimpulse sensors in the outsole create smooth transitions as M-Strike™ technology promotes a midfoot strike. Run in cushioned comfort wearing these shoes.Upper: Breathable lightweight woven FitKnit fabric upper provides a ventilated and flexible fit. FitKnit fabric includes stability panels and breathable mesh panels. Synthetic overlays offer added stability. One-piece mesh upper provides durability and lighter weight. Flat laces reduce irritation. Comes with an extra set of laces.Midsole: Removable insole provides a custom fit. Agion delivers odor protection. Resalyte™ midsole is a lightweight injection-molded compound with memory retention that helps absorb impact. M-Strike technology promotes a midfoot strike.Outsole: GOimpulse sensors and pillars repositioned on outsole to allow for an even smoother transition and optimized running experience.