Polyester , Single-sided printing High-density space elastic cotton interlayer, water absorption, fine fabric, no ball, no fading, comfortable foot feel. Not machine washable, no lint. Hemming treatment, not easy to shrink and deform. The bottom of the mat is made of non-slip plastic particles, which is non-slip and difficult to move, safer and more durable. Don't hesitate to contact us if there is any problem. We will respond you under 24 hours and solve the problems for you.