Reversible, soft-cell polymer construction, which provides superior comfort. Holds rugs in place with 100% surface contact. Safe on all surface types including laminate, hardwood, marble, tile, and stone. Will not slip or slide. Will not stain, mar or discolor your floor. Non-toxic and non-allergenic. Treated with anti-microbial agents to inhibit the growth of odor-causing bacteria, mold and mildew. Cuts easily with scissors for perfect fit. Meets flammability requirements. DOC-FF-1-70. Made in the USA!