Manduka eKO 5mm Mat + eQua Standard Towel Kit The eKO Mat is made of biodegradable tree rubber with cushion and grip that is kind to your body and the environment. This natural rubber mat uses a toxic-free softening process and is completely free of foaming agents and plasticizers found in other mats. The eKO represents a bright future for yoga mats - it leaves behind no footprint in landfills, but will definitely make a lasting impression in the studio The eQua towel features "Split" microfiber technology for optimized moisture absorption, evaporation, and "wet-grip"