Protective vinyl chair mat safeguards & protects carpets from wear & tear, extending carpet life ; Easy-glide rolling surface provides effortless chair movement ; Smooth beveled edge for easy carpet-to-mat transition ; Studded bottom surface for superior gripping power on carpets ; Free & Clear(R) nonphthalate, noncadmium formula promotes a healthy work environment while offering exceptional clarity & durability ; GREENGUARD Gold certified for low chemical emissions to UL 2818 ; Manufacturers limited lifetime warranty ; Made in the USA ; 36 x 48 ; Made for up to .5 thick, medium-pile carpets;