adidas Running - a3 Sequence W (Light Grey/Collegiate Gold/Metallic Silver) - Women's: Running shoe built for the neutral to under-pronator who requires an enhanced cushioning and extended durability. Feel propelled through every footstroke in the a3 Sequence. a3 structured units in the heel provide a fast, responsive ride in the well-cushioned training shoe. Mesh nylon upper with air mesh tongue for maximum ventilation. adiPRENE + in the forefoot maintains propulsion and efficiency. Injected EVA midsole for long-term, lightweight cushioning. adiWEAR outsole offers the ultimate in high-wear durability. Flex grooves for optimum forefoot flexibility.