The Boston Marathon is a race. But it's also a goal and a training plan during all the days it stays on your mind before the big one. The Adizero Boston 11 shoes are built for mid- to long-distance running. They bring a race-day quality to training, with a propulsive feel that comes from ENERGYRODS, which limit energy loss underfoot. They're fast, but that does not come at the cost of durability the midsole mixes ultralight Lightstrike Pro cushioning with durable Lightstrike EVA. Regular fit Lace closure Lightweight mesh upper Flexible feel with support in key areas ENERGYRODS limit energy loss Lightstrike Pro+ cushioning Weight: 9.6 ounces (size 9) Midsole drop: 8.5 mm (heel: 39.5 mm / forefoot: 31 mm) Continental Rubber outsole Upper contains a minimum of 50% recycled content Men's adidas Adizero Boston 11