Made in collaboration with the Boston-based retailer, the Concepts x adidas ZX 9000 ‘A-ZX Series - Boston Marathon’ gives the classic running shoe a retro-futuristic look, highlighted by a crinkled silver foil upper with grey suede overlays. The sneaker’s molded eyestay and heel counter are finished in Collegiate Navy, while the lateral three-stripes are rendered in a patriotic blend of navy, white and red hues. Concepts branding adorns the woven tongue tag on the left shoe.