The shoe designed to cruise through a 10K, these adidas by Stella McCartney Ultra Boost Shoes come in signature Stella color palettes. With boost? for a charged-up feel that delivers maximum energy return with every stride. Boost?'s energy-returning properties keep every step charged with an endless supply of light, fast energy. TORSION? SYSTEM for midfoot integrity; Molded 3-Stripes and heel counter for support and optimum heel hug. Sock construction; Reflective support cage. Adidas by Stella McCartney woven badge on tongue. STRETCHWEB rubber outsole is lightweight and elastic, adapting to the ground for stability and working strategically to optimize the unique properties of boost? from touchdown to push-off. Imported.