The Harmony Professional Yoga Mat by JadeYoga is made of 100% natural rubber. Natural rubber itself is non-toxic and biodegradable, grips better and has more cushion than synthetic rubber. It is the perfect mat for those looking for maximum comfort and performance. All Jade Yoga products are made in the United States in compliance with all US Environmental and labor laws. Jade Yoga partners with Trees for the Future and plants a tree for every mat sold. Buy it over at Holstee.