NEXT GENERATION OF VAPORMAX.Made with at least 40% recycled content by weight, the Nike Air VaporMax 2021 FK defines innovative comfort. Superstretchy and supportive Flyknit fabric feels like wearing a sock, plus VaporMax Air from heel to toe gives you ultra-lightweight bounce. Flex into the future with us and feel the good vibes. Flyknit FeelsNike Flyknit technology uses strong (yet lightweight) yarns to create a knit fabric that feels supportive, stretchy and breathable. Everything AirVaporMax 2020 Air evolves from multiple Air units into one big bubble from heel to toe for super lightweight and flexible cushioning. The bottom includes some Nike Grind material that's made from scraps from the footwear manufacturing process. Heel pull tab Measurements: Weight: 1 lb 7 ozProduct measurements were taken using size 7 Big Kid, width M. Please note that measurements may vary by size.Weight of footwear is based on a single item, not a pair.