Lightweight, peppy and fast, the adidas Adizero Boston 12 will put a spring in your step. The energetic foam is a layered combination of adidas’ Lightstrike Pro and Lightstrike 2.0 that is engineered to deliver a cushioned and dynamic ride. In between the layers are glass-fiber infused energy rods that give you a seamless transition from heel to toe. Reviewers loved how the Boston 12 struck the perfect balance between firm and springy in our adidas Adizero Boston 12 review.. The upper has been redesigned with an engineered mesh that gives you targeted support and breathability. There are key zones that provide both midfoot lockdown and forefoot flexibility to keep you running fast. Plus, adidas used at least 50% recycled materials in the upper. Whether you are racing a marathon or just enjoying a run in your neighborhood, make every run fun with the adidas Adizero Boston 12.