A powerhouse collaboration between British designer Stella McCartney and sportswear brand adidas, the partnership fuses performance-driven footwear with McCartney's imitable design skills and high regard for responsible fashion. The adidas by Stella McCartney Women's Ultraboost X 3.D S Trainers are crafted in clay red and burgundy fusion yarn in a slip-on sock style with a flexible compression-fit arch. Versatile fusion yarn provides outstanding breathability during sport and greater lock-down in major sweat zones. Parts of the yarn feature Parley Ocean Plastic™ which uses recycled waste to craft its material, thus preventing it from filling the ocean.

The fully knitted grey and red pattern sock leads down to a wide front elasticated band embellished with white Stella McCartney and adidas logos. Revolutionary adidas Ultra Boost cushioning on the midsole provides the highest energy return in any trainer and the white StretchWeb rubber outsole adapts and moves with the wearer for greater flexibility. The trainer sits on a grey and white Continental™ rubber sole and even more technology can be found between the heel and forefoot with the implementation of the Torsion System, which enables the foot to adapt to various surfaces without strain.