How man levels of full body protective clothing are there?

There are typically four levels of full-body protective clothing, classified by the U.S. Environmental Protection Agency (EPA) and other organizations. These levels range from Level A, which provides the highest protection against hazardous materials, to Level D, which offers minimal protection and is suitable for low-risk environments. Each level is designed for specific types of hazards, ensuring that workers are adequately protected based on the risks they face.