The Under Armour Spectre running shoe is designed for runners with medium-to-high, rigid arches who desire protective cushioning and efficient transition. FootSleeve™ ventilated internal sleeve, lined with UA Heatgear®. Stretch fit panels hug the foot and help eliminate sliding and extra bulk. DCE™ Smooth Transition is an integrated system of Cartilage1™, ArmourGuide™, ArmourBound™, and ArmourLastic™ into an integrated system to facilitate independent suspension. Cartilage1™ facilitates energy transmission and the independent movement of structural components. ArmourGuide™ is cut symmetrically for medial and lateral release to maximize cushioning at impact and reduce weight. AmourLastic™ is a more dense EVA that absorbs shock in areas of heavy, repetitive stress found in mapped zones of the forefoot to provide better propulsion from into toe-off. ArmourBound™ cushioning engineered to increase platform surface area without adding weight. Smoothes transition with a full-length ground contact fulcrum. CR37™ carbon rubber in the heel strike zone. Allows for extended wear in high impact zones, regardless of surface. SR13™f solid rubber outsole allows for the best blend of flexibility and durability. BR77™ blown rubber in the center of the forefoot helps improve forefoot cushioning. Wt. 11.3 oz.