The adidas ultra boost 2021 series of “convex front and tilted back” is officially exposed，
The new generation of ulrtra boost 21 adds more boost material area to the midsole part，
Except for some iconic details，
The updated style this time is presented in a streamlined shape of “convex front and tilted back”.
The support piece of the midsole has also become a strange “U” shape，
The shoe design is very fast.
