The best sneaker of 2015 is already making a strong case for the best sneaker of 2016, too, as adidas just dropped another dope colorway of the Ultra Boosts with no warning whatsoever.

The "Mystery Grey" Ultra Boost LTD has begun popping up at select retailers. These Ultra Boosts are built around a charcoal grey Primeknit upper that shifts to lighter shades of grey around the toe area. In comparison to the previously released "Grey" Ultra Boosts, these are a much darker color with a Three Stripe cage that sports a two-tone look.

Much like the previous "Silver" LTD and "Cream" LTD Ultra Boost releases, these are going to be considerably harder to track down than the general release colorways. As of publishing, both Rise and Renarts have sold out of the sneakers, but we'll let you know we spot more in stock. Stay woke.