Made with at least 40 % of its weight in recycled materials, the Nike Air Vapormax 2021 FK incorporates recycled and ultra-extensible flyknit fabric (as well as a flexible collar that marries the shape of your ankle) to offer you breathable comfort and An easy -to -wear style. The sewn swoosh and the TPU clip recycled in the heel bring a touch of radiance to each of your steps, while the cushioning Vapormax offers you an incredibly flexible cushioning.