Mukti Mats are a wonderful independent Australian company that provide natural rubber mats. Like all rubber mats sold here, these are made from non-Amazon harvested rubber, with non-AZO dyes used and the mats are 100% biodegradable. The most popular Mukti mat is the Grounded, which has jute woven through one side to give edgy grip, with the other side made from rubber only. The Flow is a natural rubber mat that is great for heat and sweat. We have just added the Mukti Grounded Extra Long for tall people.