AEROSPACE ENGINEERING ON YOUR FEET - THE ADIDAS SOLAR DRIVE RUNNING SHOE. The adidas Solar Drive Running Shoe is engineered to help you get faster and build distance. The responsive boost midsole has a springboard effect, using your forward momentum with minimal energy loss. Featuring a stability rail, this shoe helps guide the foot through the gait cycle. The upper is made of lightweight, breathable mesh with reflective detailing on the heel. FEATURESLace closureMesh upper with reflective details on heelDurable Adiwear outsole with Stretchweb flexibilityFitcounter heel for unrestricted fitResponsive Boost midsoleLightweight feelTECH SPECSRegular fitWeight: 10.8 ounces (size US 9)Midsole drop: 10 mm (heel: 30 mm / forefoot: 20 mm)Arch type: Normal; Stabilizing Solar Propulsion Rail