The Air VaporMax 2021 Flyknit 'Triple Black' is a sustainable take on the lifestyle running shoe. Appearing entirely in black, the shoe's upper is built with FlyKnit that incorporates post-industrial recycled yarn, with a recycled TPU heel counter offering stability. Tongue and heel pull-loops work with an elastic sock-like collar to provide easy on and off, while underfoot, a full-length VaporMax unit offers cushioning.