The collaboration between Stella McCartney and adidas for the women's UltraBoost X 'Black White' sneakers is a testament to their longstanding and successful partnership, which dates back to 2005. These shoes feature adjustable straps that not only add to their stylish silhouette but also improve the overall fit. The black Primeknit upper, which incorporates recycled materials like Parley Ocean Plastic, adds to the sustainability factor of the design. Boasting a lightweight construction, these sneakers are equipped with a full-length Boost midsole that offers unparalleled comfort and energy return. Additionally, the Stretchweb outsole, made with Continental rubber, provides excellent traction.