OPTIMAL MOVEMENT AND UNDERFOOT ENERGY - THE ADIDAS ULTRABOOST RUNNING SHOE. You'll be flying faster than ever in the adidas UltraBOOST Running Shoe. The lightweight, flexible-response cushioning is optimized to give you your most responsive ride, and the synthetic midfoot cage provides structural support. You'll get a custom, adaptive fit thanks to the Primeknit textile upper. Be confident in your stride no matter the surface conditions with the Continental(TM) rubber outsole.FEATURES Primeknit textile upper wraps the foot for a snug, adaptive fit. Structurally-supportive synthetic midfoot cage. Lace-up closure. FITCOUNTER molded heel counter offers a natural fit that allows optimal movement of the Achilles tendon. Bootie construction supplies a snug, sock-like fit. Smooth textile lining. Removable foam insole. Ultra-Cushioned boost(TM) midsole is optimized for a responsive ride.TECH SPECS Weight: 9 oz Support Type: Neutral. Cushioning: Lightweight, flexible response. Surface: Road.