This superior, translucent color chair mat will not chip or curl and is non-flammable. Molded grippers on the underside hold the mat onto practically any carpet-top including cut-pile and loop carpets without harming the carpet underneath. *LIFETIME WARRANTY on chair mats extends to cracks caused by normal wear and tear. These chair mats have a light-bulb shape which helps protect the carpet. Ideal for non-standard work spaces. Desk chair mats are 0.145" (145 mil or approx 1/7") thick.