Mammoth Office Products PVC Plastic Chair Mat for Hard Floors, Rectangular with Lip 36 by 48-Inch (V3648LHF) Unique Phthalate Free PVC plastic provides superior transparency Guaranteed not to crack, chip, break or shatter under normal use and correct applications Smooth back prevents floor damage Safer low odor formulation Lightly textured top surface for better traction 100% recyclable; made from up to 25% recycled materials using 30% renewable energy Designed for hard floors: wood, linoleum, tile, stone