This self-inflating mat is made of a TPU coated stretch polyester. As the mat is extra wide, 76 cm, and thick,10 cm, it offers additional comfort. The mat rolls up easily and quickly. The foam has a special structure with extra large horizontal tunnels that increase the sleeping comfort and make it extra compact. The mat comes with a quick valve so that it inflates quickly and deflates easily. You can determine the hardness of the mat.