STELLA MCCARTNEY ULTRA BOOST - STANDOUT RUNNING SHOES FEATURING BOOST AND DESIGNED BY STELLA MCCARTNEY. Designed to cruise through a 10K, these adidas by Stella McCartney Ultra Boost Shoes come in signature Stella colour 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; Moulded 3-Stripes and heel counter for support and optimum heel hug. Sock construction; Reflective support cage on the upper. 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 optimise the unique properties of boost from touchdown to push-off.