The Earth Elements 5 mm Mat is made with very lightweight, eco-friendly TPE (Thermoplastic Elastomer) and features dry-grippy traction and an extra-soft texture. This mat features a closed-cell construction that prevents the absorption of moisture, making it easy to keep clean and great for sweaty yogis. Due to the biodegradable properties of this mat, it should not be left in sun, extreme heat, or extreme cold for an extended amount of time. The Earth Elements Mat is not designed to last forever.