This is a 1.5mm thick yoga mat made of natural rubber. It has a non-slip effect. - Brand: JADE YOGA - Model Name: Yoga Mat - Color: Navy - Color: Fire Red - Color: Olive Green - Color: Purple - Material: Natural Rubber - Thickness: 1.5mm Thank you for viewing. I purchased this for travel, but I haven't had many opportunities to use it, so I'm selling it. I've used it about 5 times. It has not been used for hot yoga. I have washed it with a neutral detergent and hung it to dry. There are photos of the front and back (photos 2 and 4). Please check them. Please refrain from purchasing if you are sensitive to used items.