PROTECT HARD FLOORS AND CHAIR CASTERS: No Gripper. The office chair mat is only designed for hard floors including vinyl, tile, marble, hardwoods, laminate and concrete. Not recommended for carpet. HIGHLY TRANSPARENT: Our desk chair mat for hardwood floor is clear, allowing the natural beauty of your hardwood floor to shine through while providing optimal protection. ODORLESS, NON-TOXIC: Rest assured that our office floor mat is made from non-toxic materials, free from harmful chemicals or unpleasant odors, creating a safe and healthy environment for your home or workspace. EASY GLIDE ANTI SKID: Experience smooth and effortless gliding with our computer chair mat, ensuring seamless movement and preventing any damage to your office chair and precious hardwood floor. EASY TO USE: This floor protector for chairs is easy to clean and store when not in use. The desk floor mat will turn flat soon when in a comfortable room temperature Diminsions: 44" x 58"