Material unknown. It doesn't feel hard to the touch. It's a beautiful green, the likes of which you don't often see. The thickness is difficult to measure, but I think it's at least 2mm. The amount is shown in the third image (please forgive any errors due to amateur measurement). This is leftover fabric after use (for those who don't mind used items). There are fold wrinkles. #Felt #GreenFelt #FeltMat