Superior-Lock weds plush cushioning with one-of-a-kind, high-performing checkered natural rubber backing. It anchors your rug firmly to the floor while providing a thick layer of cushioned support to preserve your rug’s beauty and extends its life. Superior needle-punched felt surface grabs and holds your area rug, promoting rug evenness while preventing bunching, creeping, and curling at corners. A rich, dense felt core helps soften rug feel while preventing floor damage.