From 5k to marathon, the adidas adios will get you from start to finish in record time. A responsive boost midsole provides unmatched energy return and full length torsion system creates quick transition at toe off. Along with sticky Continental Rubber and durable adiwear heel, this racer is built for elites and weekend warriors alike to hit the roads running. A portion of the adidas AKTIV collection sales supports the AKTIV Against Cancer charity which was started by elite marathoner Grete Waitz while she battled cancer. The charity researches and promotes active lifestyles throughout cancer treatment.