The Concepts x adidas ZX 9000 'A-ZX Series - Boston Marathon' is a stylish collaboration between adidas and Boston-based retailer, Concepts. This limited edition sneaker takes the classic running shoe and gives it a retro-futuristic appearance. The upper is made of crinkled silver foil, featuring grey suede overlays for added texture. The sneaker stands out with its Collegiate Navy molded eyestay and heel counter, while the lateral three-stripes display a patriotic blend of navy, white, and red. To emphasize the collaboration, Concepts branding is prominently placed on the woven tongue tag of the left shoe.