Nontoxic TPE is healthy for you and the planet Outstanding grip and cushioning Very lightweight, perfect for travel Recyclable Patterned surface with fun colors 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 photo-degradable properties of this mat, it should not be left in sun, extreme heat, or extreme cold for an extended amount of time.