adidas is not touching much on the model but still continues to improve and move forward.
The adidas Ultra Boost 4.0 is a mixture between the 1.0 and 3.0 models. The 4.0 features a Primeknit upper from the UB 3.0, and contains the solid color cage found on the 1.0 UB.
There is no word on a release date yet but they're expected to release this December.
S/O to the Yeezy Mafia for the info!