The adidas Y-3 x BYW Boost 'King of Flowers' takes inspiration from the Botan flower, which holds cultural significance in Japan as the ‘King of the Flowers.’ This design embodies the duality of performance and style, featuring a white neoprene upper with a mesh collar, suede vamp, and a Boost midsole. The shoe also showcases a Yohji Yamamoto signature on the vamp and a Y-3 Botan logo inside the tongue. Released in an April 2018 capsule collection, it includes a black colorway of the BYW Boost, Botan-themed Y-3 Tangutsu slip-ons, Y-3 Bashyo high-tops, and an apparel line.