Rejuvenator is 100% urethane, an incredibly premium sponge compound that's more resilient than any other anti-fatigue mat. Rejuvenator is named for its ability to keep standing workers energized and comfortable. Its urethane compound is totally crush resistant and offers exceptional chemical resistance, more than most rubbers and vinyl's. Nothing else feels like it. Nothing lasts like it. Virtually indestructible, Rejuvenator consists of a closed-cell urethane sponge totally encapsulated by a dense, 1/8" thick, urethane skin. This exterior skin provides outstanding abrasion resistance in high use areas. Finally, the underside of the mat is textured urethane that grips hard, smooth floors, and prevents mat movement. First class comfort and durability make Rejuvenator an indisputable long-term value.