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.