A transformation: The adidas Ultra Boost Uncaged ditched the protective cage overlay and three-stripe branding of its predecessor, the Ultra Boost, to become a new style entirely. The shoe pairs a stretchy, adaptive Primeknit upper with responsive Boost cushioning and a lightweight outsole that easily adapts to a wide variety of terrain. A clean grey and white colorway takes a tonal approach on the adidas Ultra Boost Uncaged with grey accenting on the heel and clean metallic silver branding. This adidas Ultra Boost Uncaged "Grey" released on November 16, 2017.