Mammoth Office Products PVC Plastic Chair Mat for Low Pile (Less that 1/4-Inch) Carpeting, 45 x 53 Inches Rectangular with Lip for Under-Desk (V4553LLP) Unique Phthalate Free PVC plastic provides superior transparency Guaranteed not to crack, chip, break or shatter under normal use and correct applications Gripper back to prevent chair mat from slipping Safer low odor formulation Lightly textured top surface for better traction Eco-Friendly: 100% recyclable; made from up to 25% recycled materials using 30% renewable energy Designed for low pile carpeting (1/4" thick or less)