Made in collaboration with the Berlin-based artist . the Ruohan Wang x Nike Air Max 90 Flyleather celebrates Earth Day with custom artwork on an upper crafted from at least 50% recycled leather fiber . gathered from scraps in the leather manufacturing process. Asymmetrical hand-drawn elements include woven tags atop the padded leather tongue. Discordant colors distinguish some of the sneaker’s signature elements . including the Swoosh . heel patch and midsole wedge.