ES Robbins Carpet Chair Mat, 36-Inch by 48-Inch, Black Protects low pile carpets upto 3/8 inch thick (including padding) 36-inch by 48-inch Black rectangle chair mat Equipped with Anchor Bar cleat system holds securely, yet is gentle on carpet and fingers Modern addition to your work space. Can also used to protect carpet from pets and planters. Cadmium and Phthalate free; Greenguard certified for low chemical emissions Made in USA It takes 4.5x more exertion for a 200lb person to move a chair on carpet without a chair mat