Parley is much more than an adidas collaborator. Together with the brand, the imprint has helmed many a sustainable initiative, most built atop the beloved Ultra Boost. And with 2021 soon coming to a close, it's only fitting the two go out with the same silhouette. Making use of the somewhat newer UltraBOOST 21, Parley presents a colorway rather subdued. The exterior construction, which comprises many a different material and texture, is shaded a dark black, which contrasts the light blue stitching and counter that sit across the toe and heel, respectively. What's more, the neutral similarly amplifies the secondary laces, webbing, and pull tab, all three of which feature earth tones.