Built for high-speed comfort, the adidas adiZero Boston 6 is ready to help carry you to a new PB. Coolever mesh and lining allows cooling airflow to keep feet feeling dry and fresh. Tirrenina synthetic suede overlays add support where you need it most. EVA sockliner for extra underfoot cushioning. boost™ midsole cushioning returns energy with every step, propelling you to a faster, more comfortable run. Extended TORSION SYSTEM adds support through the midfoot, for a more natural running stride. Continental Rubber outsole for durable, all-weather traction.