Larger than conventional mats to protect larger work areas. Smooth back will not mark your floor. For hard floors and standard/medium pile carpets. Provides the ultimate in quality, clarity and durability for home and office flooring. Crystal clear polycarbonate allows the beauty of the floor to shine through and is the perfect gliding surface for chairs with casters. Polycarbonate is extremely durable and does not curl, crack, discolor or smell. Mat Type: Chair Mat; Application: Carpet; Hard Floor; Material(s): Polycarbonate.