The design of the Nike Air Max 90 LTR GS 'Black' kids' shoe successfully brings out its modern street appeal by utilizing high-quality materials in a monochromatic color scheme. These premium materials, such as full-grain and synthetic leather overlays, are skillfully enhanced with tonal stitching to ensure durability and style. Additionally, this shoe features key elements including supportive cushioning in the collar, pod traction, and an Air Max midsole, which not only enhance comfort but also contribute to the overall design aesthetic.