Note: The chair mat may come stiff in cold weather and will turn soft in warm or hot condition and easy to unroll please take the following measures if the mat become curled: 1. Unpack your mat and warm up to room temperature 22℃/72°F(Shower hot water put it by the air outlet of the air conditioner or in the sun) 2. once thoroughly warmed through we recommend that 2 people collaborate to unrool the mat ono the carpet 3. place heavy items such as a stack of book on the corners of the mat or any curled areas. your mat will be gradually retain its flat state.this could take about 72 hours depending on the encironment conditions. Addition Note: If curling issues still exists please use a hair dryer on proble areas. place hair dryer no closer than 2.54 cm and move back and forth overthe target area. Once the area has been heated bend the mat in the opposite direction. It can be put into use normally after being heated. Easy To Gliding Made of heavy duty material Dalin chair mat allows your chair wheels to glide seamlessly on top of its strong sturdy surface without scratching sinking or leaving indentations and divots Slip Resistant Design This chair mat is uniquely designed to stay in place on your low pile rug; featuring a studded spiked underside it stays securely in place on most carpets so it won’t slip or slide; before using mat test with foot to ensure it is securely in place and doesn’t move Won’t Bend or Crack Design is incredibly durable and meant to last for years; at over 2 millimeters thick it won’t bend or curl over time and will resist scratching ripping and breaking; because of the high standards put in place the mat is extremely solid and is not prone to leaving divots from chair wheels Added Protection for Carpets Help protect your rug from snags marks and overall wear and tear; since the chair mat is so thick it adds a double layer of protection to help keep your carpet looking as good as new; not recommended for medium or high pile rugs Transparent Design Transparent design of the chair mat means you don’t have to cover up your beautiful floors allowing for a seamless look throughout your home or office Specification: Material: PVC Size: 48 L X36 W X0.08 Th with Lip Color: Transparent Shape: Rectangular Surface Recommendation: Carpet