Luyara 2.5mm Extra Thick 48"×36" Office Chair Mat with Lip for Low and Standard Pile Carpeted Floors, Carpet Protectors for Rolling Chairs, Desk Chair Mat, Computer Chair Mat for Carpet (1 Pack)

NOTE:  1. Unroll the mat in a room which was the temperature is over 22 ?(77?) and lay the mat flat on a clean and level surface. 2. Make sure the textured surface of the mat is facing upwards and the nail one is facing down. If the mat is not very smooth, place some heavy objects (such as books) on the corners and center of the mat so that the nail surface fits the carpet completely. 3. It is very normal to smell some plastics just after opening the package, please unroll the product and put it in a ventilated room for about 48 hours, the smell will disappear. Specifications: 1. Material: PVC 2. Dimensions: (48 x 36 x 1/10)" (1200 x 900 x 0.25) cm (L x W x H) 3. Weight: 7.3 pounds 4. Color: clear