Synthetic soleSHOE SIZE: D = Medium widthENERGIZED FEEL: Delivers a responsive and springy ride to add extra lift to your stride without compromising support or speed.FOOT SUPPORT: Ideal for runners with a medium to high arch looking for neutral support.ENERGIZED CUSHIONING: Running shouldn’t be a zero-sum game. That’s why our BioMoGo DNA and DNA AMP midsole technology provides light-weight, best-in-class energy return. You give. Ricochet gives back.INTUITIVE FIT, INCOGNITO COMFORT: Comfort goes stealth mode inside the sleek, adaptable Fit Knit upper. Hidden features include a heel wrap and an ultra-soft heel tab to shield your Achilles from irritation. Fit Knit upper holds a host of comfort features to keep you running at your best.