This is Trash. Throughout the year, Nike has been adding more and more new silhouettes to the sustainable and innovative Space Hippie series. To build on the huge success of the series, Nike is now giving the classic Waffle Racer the Space Hippie treatment as well, putting the legendary retro runner in a futuristic and eco-friendly guise. The Nike Waffle Racer Crater comes in a recycled polyester upper and features a comfortable midsole made from at least 11% Nike Grind Rubber, a rubber blend recycled from old shoe soles. The outsole, which runs the full length of the shoe and wraps around the top of the heel, was also made from at least 15% Grind Rubber material.