As with the model’s original version, which was famously donned on-stage by Kanye West, “Footwear White” takes over the updated Primeknit+ upper and modified BOOST midsole. Profile 3-Stripes and supportive structures around the heel indulge in translucent finishes that deliver some contrast to the otherwise tonal proposition. Prototype after prototype. Innovation after innovation. Testing after testing. Meet us in the hot pursuit of the pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return. Underfoot, the Primeblue-constructed pair boasts a different Continental rubber outsole pattern than on previous Ultra Boost options, while also rethinking the use of a Torsion system.