Tonaus Office Chair Mat for Carpeted, 48"×36" Transparent Carpet Floor Protector Cover Rug Mat with Non-Slip Studded Lip, Heavy Duty for Home Computer Desk Rolling ChairBrand: Tonaus Color: Transparent Features: Chair Mat with Gripping Backing The Tonaus carpet chair mats for low pile carpets has a backing with studs that grip the carpet effectively, preventing damage from chair casters or wheels. The "teeth" on the backing are 3mm long, making it perfect for low pile carpets. Environmentally Friendly Chair MatThis carpet protector with lip is made from PVC material and is completely safe for the environment. It does