Ultra Black 22 &reg; Premium Non-Slip Rug Pads by Rug Pad Central - Felt + Rubber Area Rug Pad &ndash; Made in the USA &ndash; 20 Year Warranty (6x9) Jet black rubber backing - 10oz rubber reinforced with an additional 5oz rubber face coat to prevent premature flaking or fraying - Will not mark or stain floors. '' felt surface layer adds comfort, insulation, and floor protection - Helps soften rugs and adds floor protection. No Odors or off-gassing - hypoallergenic - mold, mildew and moth resistant Dense recycled fiber core offers soundproofing and acoustical benefits Made in the USA - 20 Year Warranty