Take your run to a whole new level with the out-of-this-world cushioning and response of the Ultra Boost. The perfect combination of performance and style, the Ultra Boost was designed as a performance running shoe, but the same tech features that make the shoe so appealing to athletes have also positioned the Ultra Boost a serious statement maker. The shoe's seamless Primeknit upper delivers a snug, comfortable fit that moves with your foot. Additionally, Primeknit's rich texture allows to play with colors and patterns, giving the Ultra Boost a premium look and feel. A supportive midfoot cage — fashioned from iconic Three Stripes — wraps the foot, providing structure where you need it most. Finally, full-length boost cushioning delivers explosive every return with every step and keeps feet feeling fresh whether you're on the run or lacing up the Ultra Boost for all-day wear. Seamless Primeknit upper for a snug, sock-like fit that stretches and moves with your foot for a truly one-to-one fit. Four-way stretch heel and external butterfly heel counter work together to wrap the Achilles, lightly holding your foot in place over the footbed without restricting your natural movement. Full-length boost midsole cushioning is ultra light and ultra responsive, absorbing the force of impact and returning that energy at toe-off, propelling you to a faster, more comfortable run. TORSION SYSTEM adds lightweight stability, encouraging a smooth, more natural transition from heelstrike to toe-off. 10mm offset. StretchWeb outsole construction adapts to your unique footstrike, allowing the boost midsole particles to freely expand and contract with the natural movement of your foot. Wt. 10.9 oz.