synthtic
adidas Primeknit is carefully engineered to naturally expand with your foot while you run to give you a more comfortable fit and help reduce irritation
boost's energy-returning properties keep every step charged with an endless supply of light, fast energy
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
TORSION SYSTEM for midfoot integrity; Moulded 3-Stripes and heel counter for support and optimum heel hug
Adidas Store invoice + Original BoxOfficially Adidas Ultra Boost-SUMMER 2016 womens PH3WJGMGB