1 layer w/2 colors design. Thicker mat providing excellent cushion / protection for knees and spine. 100%TPE ONLY All Microcell's mat products are make of 100% Thermoplastic Elastomer (TPE)via in-house patented foaming technology. As Microcell's commitment to the global village, we insist only using 100%TPE, which is wildly reckoned as the eco-friendly, recyclable and re-usable material and conforms to strict health & environment regulation to the earth, for all our products.