To say farewell to the record-breaking HBO hit show Game of Thrones, adidas released the Game of Thrones x UltraBoost 4.0 'White Walkers' sneaker in March 2019 as part of a limited-edition collection. Paying tribute to the glacial antagonists, its light blue Primeknit upper is reinforced by translucent Ice Blue lacing cage, heel counter, and mudguard. The phrase ‘Winter Is Here’ at heel signals the chilling presence of the White Walker army.