Essentials by Ergode Chair Mat Model ESS-8800C protects your low-pile carpet and keeps your chair stable with a durable anti-skid surface. Ultra-clear vinyl protects carpet while showing off its beauty. This .25" thick mat safeguards your carpets from stains, dirt, casters, and heels so your floors will last longer. Molded cleats and studs hold the chair mat securely in place. Thick and sturdy plastic won't crack, chip, break, or shatter under normal usage. Anchor bars hold mat firmly in place, even on thick carpeting. Not intended for use on hard floors. Ships fully assembled.