The adidas Ultraboost combines state of the art technology with a timeless design. The Grey colorway follows in those footsteps by giving it a subtle, a perfect summer sneaker. The shoe comes with a black Primeknit upper material with contrast knitted into the Grey upper, ensuring maximum flexibility, reducing the risk of foot damage through friction. Talking about the Ultraboost, you can`t get around highlighting the sole, the soul of the shoe so to speak, consisting of 3,000 thermoplastic polyurethane energy capsules. With every step, the white Boost sole pushes back the energy, applied through the weight of the runner. The black Continental Rubber outsole for extraordinary traction makes the adidas Ultraboost a great addition for winter or summer, temperature has no impact on the Boost and its flexibility, which means, you can run all year around with the same running experience. Finishing up, the adidas UltraBoost gives maximum heel-stability up to the Achilles, while the sock-like feeling of the shoes and its featherweight make the shoe become one with the runner. Pick up to a size bigger, since the shoe is running a bit small.