Ultra Boost ATR – The first all terrain version of the Ultra Boost is available now on the US site in the black colorway. This Ultra Boost is very similar to the original but has a water line layer and mud guard for extra protection against water. Unlike other ATR models in the past, it does not have the rugged outsole, but the same pattern as the regular Ultra Boost. The Ultra Boost ATR is available now in sizes 6.5-15 for $180.