Updated ClutchFit® technology breathes, stretches, and supports the foot. External heel counter and intershank for stability and support. Innovative bear trap lacing system connects to the tongue for a locked in fit. Achilles pillow for additional padding and comfort around the heel. Die-cut, anti-microbial OrthoLite sockliner molds to the shape of your foot. Charged Cushioning converts impact into energy. Micro G foam turns cushioned landings into explosive takeoffs.