Adidas absolutely knows how much of a hit it has on its hands with the Ultra Boost, which explains why the brand is continuing to release the model a year after its debut.
Gathered here is a quick group of colorways that haven't yet hit stores. It's unclear if they are upcoming retail releases or scrapped samples that will never be available to the general public—either way they provide some eye candy for fans of the silo.
Colorways here include a chocolate brown one with leather accents, another multicolor and one with regal gold sections.
Stay with Sole Collector for info on the possible arrival of these Ultra Boosts in sneaker stores. 
