Anti Fatigue Anti-Microbial Mats are made in the USA from a 1/2 inch thick nitrile foam. They offer excellent anti-fatigue properties designed for indoors and outdoors. The anti-microbial treatment prevents odors and degradation of the mat. Their beveled edges provide a safe transition from floor to mat. They are resistant to chemical, grease, and oil. These Anti Fatigue Anti-Microbial Mats are light weight and easy to clean.