Unlike plastic chair mats that crack and bend easily, this office mat is made from 100% Anji Mountain bamboo--considered the strongest in the world. Every winter bamboo plants in China's Anji region are exposed to a two month freeze that reduces the flow of sap, resulting in a slower rate of growth that promotes a dense, durable bamboo with a tensile strength greater than steel. The bamboo is kiln-dried and carbonized to remove excess moisture that can lead to cracks and splinters, ensuring years of reliable use. The 1/4"-thick mat is finished with seven coats of the same scuff-resistant protection used on hardwood floors. A felt backing keeps the mat from shifting and protects floors, and the rounded edges enable chairs to easily roll on and off. Folds for easy storage. Specify Cherry or Natural finish. 1/4" H x 57" L x 55" W. (31 lbs.)