The Klein Tools P100 Half-Mask respirator offers protection without compromising comfort and wearability. When paired with the replaceable P100 filters, this respirator is approved in accordance with NIOSH to provide protection against all particulate aerosols including solid and liquid particules such as dust, fumes, and oil mist. The lightweight and compact profile minimizes interference with safety glasses for maximum visibility on the jobsite. Designed with a simple, push-in fit check mechanism for quick and easy face seal validation. In addition, there is a built-in sample port for non-destructive face fit testing. Replaceable P100 filters are low-profile and easy to change as needed.