Push your pace with the adidas adiZero Boston 9. This update to a beloved trainer features an engineered mesh upper, which gives you a comfortable, locked-in fit. Boost and EVA in the midsole deliver a faster push-off, while a supportive internal heel counter is highlighted with bold graphics. Engineered mesh is stretchable with areas of fully integrated support. Energy return absorbs shock through the Boost™ midsole. Continental™ Rubber gives you a high-performance compoundfor all running surfaces. Boost™ midsole returns energy you put in from mountain to street. Lace closure lets you adjust your fit. Microfit stretch mesh upper flexes naturally with your foot. Locked-down feel keeps you close to your cushioning. Lightweight running shoes let you conserve energy. Boost midsole and Lightstrike cushioning carry you through those extra miles. Wt.: 8.4 oz. (men's size 9).