Fast and responsive, the adidas Adizero Boston 13 is your perfect partner for speed training and race day preparation. The Boston 13 continues its legacy as a lightweight trainer that bridges the gap between daily runs and race-day performance. With thoughtful updates to improve comfort without sacrificing speed, this versatile shoe will help you push your limits during tempo runs and speed work as you train to crush your next goal. Details Upper: The extremely lightweight mesh provides targeted support and breathability exactly where you need it. Thanks to a softer heel and tongue design, you'll enjoy the best step-in feel yet, while the secure midfoot lockdown keeps your foot stable through every stride. Midsole: The innovative ENERGYRODS 2.0 system made of glass fiber works together with the perfect blend of LIGHTSTRIKE and LIGHTSTRIKE PRO foams to deliver a ride that's both cushioned and propulsive. This combination gives you the soft, lightweight feel you want for comfort with the energy return you need for speed. Outsole: The new LIGHTTRAXION outsole reduces thickness and weight without compromising grip, while Continental rubber provides reliable traction during toe-off no matter the conditions.