These women\'s running shoes maximise the energy-returning benefits of their boost™ midsole with a lightweight, elastic STRETCHWEB outsole. An engineered mesh upper with seamless panels provides superior ventilation and comfort. The heel hugs and guides your foot, while the outsole grips wet and dry surfaces.. ENGINEERED MESH supportive fit through a breathable, engineered lightweight textile.. FITCOUNTER supportive heel construction designed to enable the free motion of the achilles tendon.. BOOST ultra responsive comfort and cushining combined with unmatched longevity in every climate. stores and unleashes energy every time the foot hits the ground. STRETCHWEB adapts to every runner\'s foot strike by unleashing the full potential of BOOST to provide a smoother and more flexible ride.. STRETCHWEB adapts to every runner\'s foot strike by unleashing the full potential of BOOST to provide a smoother and more flexible ride..