Category III protective coverall offers optimum protection against hazardous substances such as chemicals. However, this is usually at the expense of breathability and wearing comfort. For this reason cleanroom overalls tend to be worn instead. These offer breathability and protection for the cleanroom, but they are not classed as certified personal protection equipment (in accordance to the PPE directive 89/686/EEC or PPE Regulation 2016/425) certified PPE must be worn when handling hazardous substances).
