In 2005, renowned fashion designer Stella McCartney collaborated with adidas to create a collection of performance apparel and footwear. One of the notable pieces from this collaboration is the women's UltraBoost X, which incorporates several key features such as the adaptive arch, molded heel counter, Boost midsole, and Stretchweb outsole. The overall design of these shoes is characterized by a sleek build and a laceless, cage-free Primeknit upper. Notably, the upper is crafted using recycled polyester yarns and embellished with shiny TPU overlays, adding a touch of aesthetic appeal to the functionality of the shoes.