ES Robbins Everlife 48" x 72" Medium Pile Series Rectangle Anchorbar Chair Mat, Clear Anchorbar chair mat cleat system holds securely, yet is Gentle on carpet and fingers Green Guard Certified for low chemical emissions to UL 2818 Protects medium pile carpets up to 3/4" thick including padding All day support for everyday office use. High Quality, clear mat protects carpet from wear and tear