The adidas Ultra Boost line has more to offer than the original model. Enter the Ultra Boost ST, a version of the sneaker created to offer runners more stability. The silhouette features updated Primeknit, a slimmed-down heel cage, and full-length Boost. This Grey colorway has Navy and Footwear White accents, with the former appearing throughout the primeknit construction and the caging. The latter can be seen on the Three Stripes branding and tongue tab. A pop of Core Red adds some character to the Boost midsole. A black outsole completes the clean look.