Product Code: ID6901 Product Color: Flash Aqua/Silver Metallic/Light Aqua The Boston Marathon is a race. But it's also a goal, a training plan and all the days it stays on your mind before the big one. The Adizero Boston 12 Shoes are built for mid- to long-distance running. They bring a race-day feel to training with a propulsive feel that comes from the glass-fiber-infused ENERGYRODS 2.0, which limits energy loss underfoot. They're fast, but that does not come at the cost of durability — the midsole layers ultra-light LIGHTSTRIKE PRO cushioning with a new version of durable LIGHTSTRIKE 2.0 EVA. Regular fit Lace closure Lightweight mesh upper Textile lining ENERGYRODS limit energy loss Lightstrike Pro cushioning Weight: 9.5 ounces (size 9) Midsole drop: 7 mm (heel: 38 mm / forefoot: 31 mm) Continental™ Rubber outsole Upper contains a minimum of 50% recycled content