No More Marks On Carpet: Chair mat thickness: 0.09 inche, 3mm long teeth make it suitable for low pile carpet, office chair mat can prevent the wear and tear of carpet caused by office chair casters, and also protect carpet from damage caused by sharp objects Non-Toxic Safe Material: This office chair mat for carpet is made of PVC, does not contain BPA, phthalates and volatile toxins banned in children's toys and medical devices, it is safer to use, and the surface is easy to clean Non-Slip Transparent: The chair mat is highly transparent, and the beauty of the carpet texture can be seen through the chair mat. The back of the chair mat has 3mm long teeth, so the chair mat will not slide when the chair moves smoothly Ergonomic Design: This computer chair mat is ergonomically designed to provide you with greater mobility, it is very flexible and reduces leg fatigue by taking the burden off your legs Multi-Scene Use: The chair mat is suitable for home, office, game room, can be used as a carpet protector, computer desk and chair mat, suitable for low-pile carpets and woven carpets, not recommended for high-pile carpets and wooden floors Rolled Up Packaging: WASJOYE chair mat will be delivered in a rolled up packaging, but they will return to flatness quickly. Please add weight to the rolled corners of the office chair mat. The heavier the weight, the faster it will return to flatness.