Thickened Chair Mat for Carpet - 48”X 36” Heavy Duty Office Chair Mat for Low-Pile Carpeted Floor. Easy Rolling Carpet Protector for Office Computer Desk Chair, ClearBrand: TONOS Color: Rectangular Features: Chair Mat for Carpet TONOS chair mat shields low pile carpets (up to 1 4" thick) from the wear and tear caused by office chair movement, ensuring your carpet lasts longer and remains in top condition. Heavy Duty Carpet Protector: Upgraded desk mat for carpet coming with extra thickened Polycarbonate, 3mm thick. The office chair mat guarantees long term daily use without cracking, breaking, or shattering.