Undefeated . an LA-based sneaker and apparel shop . focused on altering Nike's Air Max 90 for their four-piece December 2019 release. A full-grain leather upper elevates the design and offers a unique take on the classic. The shoe's black and blue mix makes it easy to identify the collab . painting co-branding hits in Blue Fury. The cool-toned hue traces the model's perimeter . providing a border between upper and midsole . before appearing again on the Max Air unit and outsole.