Features: The floor mat is Odorless, no BPA, does not contain volatile odor for a healthy indoor environment. The unique surface texture allows your office chair casters to move easily while carrying out daily tasks, but has enough grip to maintain controlled rolling so the chair doesn't skid around. Our office Chair Mat made from long-life pure polyethylene that protects your floors and prevents everyday wear and tear caused by office chair casters (wheels) and other markings. The mat’s surface is strong and sturdy, so your chair’s wheels will easily glide across the mat, without scratching, sinking, or leaving indentations. The mat is also flexible and can be laid flat without curling. Attentions: Keep away from fire or extreme heat. For the purpose of saving packing space, our office Chair mats may be rolled when packaged. Rolling back, and the chair mat will be gradually flat over several hours. Try placing it in a warm room or near a sunny window for best and quickest results. When you open the package, you will find that the office chair mat has two different sides: One is smooth and the other side is matte. Please let the chair mat flat on your floor and put the matte face up.  Specifications: Material: polyethylene Dimensions: (45 x 53 x 1/16)" (115 x 135 x 0.15) cm (L x W x H) Weight: 4 pounds Color: clear Package Includes: 1 x Office Desk Chair Mat 1 x User Manual