This adidas Ultra Boost 4.0 looks like the Ultra Boost is joining forces with the retro adidas ClimaCool for its most breathable construction to date with a release date slated for Spring 2018. According to Yeezy Mafias preview images, the Ultra Boost CLIMA skips over the usual caged construction with a new ventilated Primeknit overlay instead for lockdown support that has more ventilation than ever before.