The Calibrate Runner Mono featuring XETIC, the latest innovative midsole technology from PUMA (co-created by MIT). XETIC technology responds uniquely to the specifics of your individual step. The calculated infinity curve structure results in personalized response under impact, delivering cushioning right where you need it. The upper features an engineered knit vamp with a woven Kevlar panel in the midfoot for lightweight strength and support. Calculated cushioning responds under applied force to minimize impact and maximize comfort for a smarter, sleeker ride.