Office Marshal Black Office Chair Mat - 36" x 48" - Carpet Floor Protection - No-Recycling Material - High Impact Strength THICK & STURDY: Made from long life polypropylene, these chair mats are thick and sturdy yet very pliable to prevent cracking or shattering. Office Marshal's polypropylene range combines premium floor protection standard with prices that you can afford EFFECTIVE GRIP: Studded underside holds the mat firmly in place on carpet floors - Suitable for use on low and medium pile carpets (Max. pile: 0.6") EFFORTLESS ROLL, STABLE GRIP: The unique surface texture allows your office chair to move easily while carrying out daily tasks, but has enough grip to maintain controlled rolling so the chair doesn't skid around. Ease of rolling between tasks promotes ergonomic posture and helps to considerably reduce the risk of leg fatigue. INDOOR AIR FRIENDLY: No off-gassing - 100% odorless, free from BPA, phthalate, PVC and volatile toxins for a healthy indoor environment BUY WITH CONFIDENCE: Office Marshal dedicated to providing premium quality products for your home and office without the heavy price tag charged by many of our competitors. Experts in ergonomic chair mats, our vigorously tested product range is sure to meet all of your needs. For more options please see our wide range of polycarbonate, PVC, polypropylene, Eco-Series and fun colored chair mats.