Description Clear chair mat made from renewable plant sources. Contains 26% USDA certified biobased content by weight. Phthalate-free and cadmium-free. Protects loop/berber style carpet up to 3/8" thick including padding. Exclusive AnchorBar® cleats hold firmly in place, yet are gentle on carpet and fingers. Ideal for moderate use in home and office applications. Straight edge. Warranty: Manufacturer's limited lifetime "No Crack Mat" warranty.