The Ultraboost 21 represents a welcome return to form from adidas. There are lots of todaycapture.com performance improvements, with 6% more Boost, greater responsiveness and an updated upper. But the biggest difference is in the design; it is visually so much better than the UB19 and UB20. This is the best Ultraboost update in years; runners will be happy with the tech updates, whilst those who wear them casually will be delighted with the new aesthetic.
The latest Ultraboost is our most holistic boost shoe ever. As well as fusing the design adidas shoes for men black aesthetic of the original Ultraboost with the latest technological advances, it is also our most sustainable Ultraboost, using PRIMEBLUE in the upper – a high-performance recycled yarn containing at least 50% Parley Ocean Plastic. We believe that UB21 is the perfect shoe for everyday runners.
By increasing the amount of BOOST, you now get a very soft, transitional feeling adidas ultra boost 21 grey when the heel strikes the ground, which gives a smooth transition through the rest of the foot, with the adidas LEP creating a spring effect through the forefoot for a more responsive ride and incredible energy return.
With the UB21 update, the Ultraboost is more attractive than it's been in years. The Ultraboost has such a strong style legacy, and adidas seemed to forget Popular style that in the last two versions. The UB21 is a much more natural successor to the original Ultraboost. Gone are the 3D heel frame cutouts and clunky lace cages, with both the solid plastic heel counter and plastic sidewall cage making a comeback. It isn’t a full plastic cage like version 1-4, as the cage is not connected to the midsole, instead stitched on just above it, and there are translucent elements making it less intrusive.