"NoTrax Ergo Mat Ergonomic Rubber Floor Mat has a corrugated ribbed top surface of resilient SBR rubber. This rubber is bonded with dense closed cell foam base with UniFusion technology for excellent ergonomic comfort and slip resistance. RedStop eliminates slippage. All 4 sides have sloped, beveled foam for easy on/off mat. 1/2' overall thickness. Black. U.S.A. Pattern Design Ribbed, Padded Yes w/foam, Dimensions L x W ft. 5 x 3, Material Type Rubber, Thickness in. 1/2, Color Black."