The shoe still features the components from across the line with the implementation of the knit upper, a translucent cage, and a pattern near the forefoot that mirrors the OG. And if you didn’t notice, a heavy amount of Boost makes its way to the heel for added support and comfort. The extra Boost gives the UB 21 a unique shape that looks marathon ready.Enjoy relaxing miles where your likes will be feeling fresh all thanks to the Boost cushioning. Experience soft landings and responsive takeoffs in this neutral high cushioned trainer.
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