A scientific advancement by human and machine: calculated cushioning by PUMA. Calibrate Runner is powered by XETIC technology and coded in a language of its own—with meticulously-tested cushioning, conceived and fine-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 patterns to be the most efficient for comfort and rebound. The end result: visible cushioning technology that compresses as you step for infinite comfort.