28"X30" Smooth Glide Slip Resistant Desk Chair Mat Hard Wood Floor Protector, Stay in Place Plastic Computer Chair Mats for Rolling Office Chairs Not for Carpet Extra-Thick 2mm Design for Desk Mat: desk mat for chair is upgraded to 0.08" (2mm) thickness, making computer chair mat significantly thicker, tougher, and more durable than most 1mm office floor mat on the market. No curling, no cracking, no indentations from chair wheels. Non-Slip Design for Office Floor Mat - desk mat features a frosted-texture top for smooth rolling without slipping, and a grip-enhanced anti-skid bottom that keeps the mat firmly in place—even with heavy chairs or high movement. Chair Mat for Hard Floors Only – computer chair mat designed to protect hardwood, tile, laminate, and vinyl floors from scratches, scuffs, and rolling chair damage. Not for use on carpet.