Our Gaia Yoga Mats are made from a newly developed, innovative closed-cell Nitrile/Buna N Rubber(NBR)foam, and are free from any toxic materials. Their low apparent density reduces weight without performance loss, and our Gaia foam does not contribute to greenhouse emissions. Resistant to most chemicals and petroleum products, our Gaia Yoga Mats won"t break down when they become wet, making them ideal for use in hot yoga or Ashtanga classes. The super soft high resilient foam offers great support and give extra cushion for kneeling poses and jump-backs, while providing a fantastic comfortable feel, slip resistance, and resistence to cold and heat. Best of all, our mats are easy to clean and have great shock absorption, and because of this it can also be used as a Pilates mat, or for use in exercise aerobics, rehabilitation and hydrotherapy.