For the open road, the adidas adiZero Boston Boost 5 features a formation mesh upper that adapts to all foot types while eliminating irritation. Mesh lining helps moisture and heat exchange between your foot and the air. adidas boost midsole foam provides extra cushioning and energy return, while the midfoot torsion system offers stability and propulsion through the midfoot phase of the gait cycle. A Forefoot Continental Rubber outsole gives great traction in dry or wet conditions. adiWear heel delivers grip and durability. Wt. 9.0 oz.