When adidas Stan Smith shoes first appeared on the courts in the '70s, their transformation from tennis shoe to global icon couldn't have been predicted. Their future, however, is clear. These shoes were created to reduce material waste. And while they can't save the planet by themselves, they're a step in the right direction.nnThis product is made with Primegreen, a series of high-performance recycled materials. 50% of upper is recycled content. No virgin polyester. It's also made with vegan alternatives to animal-derived ingredients or materials.