With the AEROCHARGE FUSION STZ, we are making indoor shoes even better. This shoe is another excellent addition to the popular Aerocharge collection: it combines an intelligent Aerocharge outsole with a fully knitted, reinforced upper and a sock-like construction. Take quick steps and turn securely, thanks to a strong inner rubber band for stability and lockdown. An external heel cap and double-row eyelets provide optimal flexibility and breathability. Get ready to achieve your goals with this powerful shoe that supports you every step of the way. Medium/wide fit: Choose your standard size for a slightly wider fit or half a size smaller for a snugger fit.