The sneakers that helped define street style are reimagined with Crater Foam, weighing in with at least 20% recycled materials. The supersoft Crater Foam midsole is made from a spacey mix of approximately 11% Nike Grind rubber and foam materials. With a speckled outsole made from 15% Nike Grind rubber, each pair of the Nike Air Force 1 Crater is unique and durable. Crater Foam is a revolution in comfort. It's made from recycled materials, adds spring to your step and features the original cupsole design but with deeper grooves for a modern look.