Made from at least 40% recycled materials by weight, the Nike Air VaporMax 2021 FK is airy and easy to wear with superstretchy, recycled Flyknit fabric (plus a soft collar that sculpts your ankle). The stitched-on Swoosh and recycled TPU heel clip add a splash of intrigue as you float down the streets on incredibly soft VaporMax cushioning. Originally designed for performance running, the revolutionary VaporMax 2 Air unit is made from recycled material and provides more Air underfoot than ever before. Stretchy and supportive Flyknit upper is made from post-industrial recycled yarn and creates a striking visual that's seamless, breathable and feels as light as air. Made from at least 40% recycled materials, it lets you look good by doing good. Collar sculpts the ankle for a sporty look that feels great while padding on heel adds to the comfort. Recycled rubber on the sole adds durability and traction, putting a finishing touch on the shoe that lets you walk the talk. More Details. Nike Grind rubber details for added traction and durability. Plastic heel clip adds heritage styling.