Cleartex Megamat Heavy-Duty Polycarbonate Mat For Hard Floor/all Carpet, 46 X 60, ClearPolycarbonate will not crack, curl, cup, discolor or smell in normal use.Twice the impact strength of vinyl for an easy glide ergonomic surface.Will not adversely affect varnished or lacquered wooden floors. WARNING: This product can expose you to Bisphenol A (BPA), which is known to the State of California to cause Birth Defect/Reproductive Harm. For more information go to www.P65Warnings.ca.gov. - Birth Defect/Reproductive Harm:Bisphenol A (BPA)