Modern meets classic in the Nike Air VaporMax 2021 Flyknit. Made from at least 20% recycled material by weight, this easy-to-wear design features a stretchy, FlyKnit upper with a soft, seamless collar. The Swoosh and recycled plastic heel clip add a splash of intrigue as you float down the streets on incredibly soft VaporMax cushioning. Performance Comfort Originally designed for running, the revolutionary VaporMax 2021 Air unit is made from recycled material and provides more Air underfoot than ever before. Look Good, Do Good 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. Product Details Rubber outsole Plastic heel clip Traditional lacing Seamless collar Nike Air VaporMax After the 7-year journey from ideation to release, the Air VaporMax represents a new era in Nike innovation. To truly capture the feeling of “running on air,“ the designers restructured the Air unit to be attached directly to the upper. As you step down, each lug gets pushed into the Air unit, ramping up the pressure. Then, as you step off, the pressure releases creating springy bounce with superior flexibility. Made for runners, the futuristic technology was quickly adopted by the street, bringing this light-as-air feeling to the masses.