Its "Space Waste Yarn" upper includes about 90% recycled polyester—made from recycled plastic bottles, t-shirts and yarn scraps—and is patterned with terry cloth zones designed to maximise comfort. A soft, Crater Foam midsole combines Nike Grind with a blend of foams for stability and a unique aesthetic, while the shoe's insole is made from ZoomX foam scraps, the same cushioning that creates the ultimate ride in Nike's NEXT% running shoes.