With stability where you need it, cushion where you want it, the Structure 25 supports you for long miles, short training runs and even a down-and-back before the day ends. It’s the stability you seek, loyal from the first tie-up, tried and trusted, with a midfoot system that’s fully supportive and more comfortable cushioning than before. A combination of tuned support and intentionally placed cushioning helps you feel secure with every step. The Structure 25 is the most stable shoe in Nike Running range. The updated foam midsole works with wider midfoot support and an increased rocker to give you a more stable platform underfoot and smoother transitions from heel to toe. New and improved foam on the midsole provides a soft and comfortable feel as you log your miles, and high foam stacks help keep you comfortable. Shaped like a rocker, the foam provides support for the 3 phases of a runner's stride. It offers flexibility when your foot rises off the ground, a smooth ride when your foot is moving forward and cushioning at ground contact. Whether you want to run a little bit faster or with a little less effort, responsive shoes help give you slightly more spring in your step to get more out of your run. An Zoom Air unit in the forefoot offers responsive cushioning. Every step helps create energy return to help drive you forward with a springy, responsive sensation. The accommodating forefoot allows you plenty of space to spread out your toes. The wider forefoot complements a wider base and smooth ride. Added structure and containment around the heel provides a more support fit.