Deflecto DuoMat Multi-Surface Chair Mat with Lip - 45" x 53"The DuoMat is a one of the most versatile chair mats on the market, offering dependable, multi surface floor protection. The underside of the DuoMat features a proprietary coating to keep the mat in place and prevent sliding while the Free and Clear non orthophthalate, non cadmium formula provides exceptional clarity and promotes a healthy work environment. All DuoMat chair mats are GREENGUARD Gold Certified for low chemical emissions and healthier