Vibration reduction The unique Vibe ™ Technology midsole construction - using EnergyCell ™ + and Opal technologies - eliminates fatiguing stress caused by vibrations for a soft and dynamic roll. Optimized rolling Geometric Decoupling ™ technology is centered for smooth rolling from ground contact to rebound. Perfect fit The lightweight, SensiFit ™ upper designed for street running shoes makes the footwear conform to the shape of the foot and holds it in place, providing comfort and dynamics without unnecessary weight.