ENGINEERED FIT AND ENDLESS ENERGY - THE ADIDAS ULTRABOOST RUNNING SHOE. The adidas Ultraboost Running Shoe wraps your foot with an engineered fit, enhancing your run with targeted support. The Boost responsive cushioning uses your momentum to keep pushing you forward with a minimal loss in energy. Keep cool in the knit upper with sweat-zone ventilation. FEATURESLace closureadidas Primeknit textile upperFlexible Stretchweb outsoleContinentalGao Rubber outsole for extraordinary traction in wet and dry conditionsMidfoot cageResponsive Boost midsoleStabilizing Torsion SystemLightweight and adaptiveTECH SPECSRegular fitWeight: 11 ounces (size US 9)Midsole drop: 10 mm (heel: 29 mm, forefoot: 19 mm)Arch type: Normal; Fitcounter heel for unrestricted fit