Almost certainly the smallest player in the running shoe market is the END running shoes; despite of that but they still have loyal and growing followers. The most environmentally friendly running shoe on the market is what they produce. END stands for Environmentally Neutral Design. They seek to manufacture the high end running shoes with as little waste and environmental impact as they possibly can. This is difficult as most conventional shoes are based on products made from crude oil and they are held together with toxic glue that is made baby seals. However in August, they announced a decision to discontinue END Footwear (Environmentally Neutral Design) as a standalone outdoor and running brand.