The Stella McCartney x adidas Ultra Boost X 3D is yet another standout silhouette from the collaborative partnership between the renowned fashion designer and Three Stripes this summer. Flaunting a sleek, sock-like construction, the model is colored in a stealthy theme of Urban Earth and Night Steel across its Primeknit 360 textile upper and branded elastic strap on the midfoot. Finally, an extended heel tab and eye-catching leopard print Boost midsole tops off the bold design.