Nothing but the best for your next PR. Your updated Men's adidas Adizero Boston 12 is a sleeker, lighter (by a whopping 4 grams), softer running shoe - it'll take your breath away. To start, the upper features a new eye-stay and Slinglaunch heel construction, locking your foot in place during speed work or tempo runs. ENERGYRODS 2.0 sits deeper into the heel than before giving you plush steps with each heel strike. Adding to the fireworks, Lightstrike PRO works with Lightstrike 2.0 to give your Adizero Boston 12 increased resilience and energy while you find your speed.