Ultra Black 22 rug pads provide the ultimate support system for your Oriental, Persian, or area rug. Ultra Black 22 is 100% felt and rubber rug pad designed for keeping rugs anchored to the floor while providing comfort and cushioning under your rugs. We offer a signature jet black natural rubber backing, which combines a full 10oz/sq yd of rubber with a reinforced 5oz/sq yard rubber face to prevent fraying, flaking, and premature wear. Our signature jet black backing is combined with a ¼'' (22 ounce) layer of felt to help support and cushion your area rugs. This dense fiber core helps prolong the life of your area rugs by reducing wear and tear from daily use. This added layer of felt protection also provides insulation, noise reduction, and acoustical benefits. Ultra-Black 22 works well with all types of rugs, but especially with thinner flatwoven rugs such as kilimns, dhurrie, and soumac rugs. Ultra black 22 is manufactured with 100% felt & rubber and contains no glues or adhesives that can outgas, offering a more natural & eco-friendly rug pad alternative to traditional plastic, vinyl, and pvc rug pads. Our felt is heat pressed to the rubber, not glued, for added durability. As the cost of rubber increases, manufacturers have been using more "clay fillers" in their rug pads to reduce costs. The more clay fillers are used, the faster the rubber backing will fall apart and crumble. The alternative to most felt and rubber rug pads is traditional open weave PVC padding. While more cost effective, these overseas pads can often outgas and may contain potentially toxic chemicals and plasticizers such as phthalates and formaldehyde. Both bad for the environment and bad for your floors, out-gassing from inferior padding can react with certain floor finishes to leave them permanently stained and discolored. Ultra Black 22 is manufactured in the USA using only 100% felt and rubber materials. Each rug pad comes standard 20 year warranty.