The Ergo Bubble Mat is a mat for you to stand on while working at your computer. Molded, beveled edges on all sides allow for easy cart access and provide added safety measures. The SBR/Natural blend helps reduce bottom-out effects. The Mat will emanate a strong rubber odor for the first few weeks of usage, but does dissipate with time. It is not recommended for use in a small closed office setting. Available in two sizes.