Office Marshal Chair Mat for Carpet Floors, Low/Medium Pile - 30" x 48", Multiple Sizes - 100% Pure Polycarbonate, No-Recycling Material - Transparent, High Impact Strength CRYSTAL CLEAR: 100% pure polycarbonate - Highly transparent, rigid and thick. Polycarbonate chair mats are an affordable alternative to glass mats thanks to their strength & transparency, providing effective protection whilst allowing the beauty of your floor to shine through. UNBEATABLE DURABILITY: The material of choice for making bulletproof glass and vests, chair castors are a breeze for the hardy polycarbonate, providing unbeatable protection against chair castors. The best chair mat material, which will not bubble or compress under pressure. EFFORTLESS ROLL, STABLE GRIP: Designed to allow chair castors to glide freely as if on a hard floor surface, but has enough grip to maintain controlled rolling so the chair doesn't skid around. Ease of movement whilst carrying out daily tasks promotes ergonomic posture and helps to considerably reduce the risk of leg fatigue. SUPER GRIP BACKING: Studded underside holds the mat firmly in place - Designed for use low/medium pile carpets (Max. pile: 0.6"). Office Marshal best-selling chair mats are designed to provide high impact resistance and under standard use will not crack, curl, break, scratch or discolor. BUY WITH CONFIDENCE: Office Marshal are 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 coloured chair mats.