Celebrating the partnership between the American space agency and the German sportswear brand, the NASA x adidas Ultra 4D ‘Halo Silver’ delivers a neutral colorway of a lightweight runner built with futuristic cushioning technology. A reflective finish is applied to the lattice structure of the 3D-printed 4D midsole, formed with a combination of light, oxygen and liquid resin. Up top, the sneaker’s knit construction features Primeblue, composed from high-performance recycled materials made in part with Parley Ocean Plastic.