Adidas Adizero Boston 12 Men`s Lucid Blue Cloud White Impact Orange UK 8.5 ONLYThe Boston Marathon is a race. But it's also a goal, and 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 fibre infused ENERGYRODS 2. 0, which limit energy loss underfoot. They're fast, but that does not come at the cost of durability the midsole layers ultra light