Wore once but spilled liquid on them (light mark see pictures). Space Hippie uppers is created using what is called 'Space Waste Yarn.' These yarns are made from 100 percent recycled material — including recycled plastic water bottles, T-shirts and yarn scraps. Combined with the other elements of the Space Hippie 02, we get an upper that is 90 percent recycled content by weight." Tooling of all Space Hippie shoes, created with 'Crater Foam,' is made with a blend of standard Nike foams and 15 percent Nike Grind Rubber. The reduction in virgin material gives a lower carbon footprint and the Nike Grind granules create a really unique texture and color mix on every midsole."