Boost™ midsole providing ultra responsive comfort and cushioning Unmatched longevity in every climate Stores and unleashes energy every time the foot hits the ground Primeknit superior seamfree fit through a precisely engineered, adaptive, lightweight knitted textile created in one step Stretch web adapts to every runner's foot strike by unleashing the full potential of Boost to provide a smoother and more flexible ride Fitcounter supportive heel construction designed to enable the free motion of the achille Experience the feeling of your best-ever run every time you lace up your shoes. These running shoes from Adidas are built with an ultra-responsive boost midsole that absorbs the power from your footstrike to release it at push-off for a light, super-energised ride. The Adidas primeknit upper holds your foot in comfort through each phase of the gait cycle, while a supportive cage secures a lockdown fit. A stretchy grid-like outsole flexes to adapt to the way your foot hits the ground.