From scraps to the streets, we put a fresh twist on the 1977 OG.The Nike Waffle Racer Crater combines Crater Foam with Nike Grind rubber details for a rugged, athletics-inspired look, weighing in with at least 20% recycled materials.The Crater Foam midsole is made from a spacey mix of foam materials and 10% Nike Grind rubber, while the speckled Waffle outsole is made from 15% Nike Grind rubber, making each pair unique and durable.