adidas x Stella McCartney UltraBOOST Speed Core Black/ Ftw White/ Core Black Out of stock Brand : Adidas Model : Adidas Ultraboost Stylecode : IF0430 Color : Black Gender : Unisex Get your hands on the adidas x Stella McCartney UltraBOOST Speed Core Black/ Ftw White/ Core Black from the best sneaker stockists around the world.