A contained room in which contaminants such as dust are reduced to a very low level by special processes so that operations such as the manufacture and assembly of delicate equipment or working with biological materials, can be performed effectively. Clean room gloves are widely found in the electronic and pharmaceutical laboratory industries. There are several clean room class types, the lower the class number the cleaner the environment/less particulate allowed: Class 1 (M1.5), Class 10 (M2.5), Class 100 (M3.5), Class 1000 (M4.5) and Class 10000 (M5.5).