A scientific advancement by human and machine: calculated cushioning by PUMA. Calibrate Runner is poweredby a partnership with the Kevlar® brand and an infusion of XETIC technology. It’s coded in a language of its own with meticulously tested cushioning, conceived andfine-tuned in a lab for the techiest streetwear collectors. What you see is what you get: compression in all the right places for step-in comfort and data-proven design.XETIC cushioning is a modified combination of structure and foam, proven among hundreds of virtual patternsto be the most efficient for comfort and rebound.The end result: visible cushioning technology that compressesas you step for infinite comfort. Straight from the lab, into the future.