The Nike Air VaporMax 2021 FK is made from at least 40% recycled materials. It has a breezy, comfortable design made of ultra-stretch recycled Flyknit fabric (and a soft collar that wraps around the ankle). Embroidered Swoosh logos and recycled TPU heel tab add a touch of intrigue as you cruise the streets with incredibly soft VaporMax cushioning.AdvantagesThe revolutionary VaporMax 2 Air unit, originally designed for competitive running, is made from recycled material and provides better cushioning than any model before it.The first one-piece Air cushion along the entire length of the shoe allows for smooth transfer of body weight from heel to toe and provides incredible cushioning.The flexible, supportive seamless Flyknit upper is made from post-industrial recycled yarn for a breathable, feather-light feel.Consists of at least 40% recycled material, so it looks great and is environmentally friendly.The collar is comfortable and wraps around the ankle for a sporty look, while padding in the heel area adds comfort.A durable and adhesive sole made of recycled rubber is the perfect complement to this model.