adidas a3 Sequence 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. Molded EVA insole for anatomical comfort. adiPRENE inserts in the forefoot maintains propulsion and efficiency. Heel a3 for optimized energy use throughout foot strike. Injected EVA MIDSOLE: for long-term, lightweight cushioning. adiWEAR OUTSOLE offers the ultimate in high-wear durability. Flex grooves for optimum forefoot flexibility. 12.40 oz. Enjoy adidas a3 Sequence experience.