The Klein Tools 60553 P100 Half-Mask Respirator provides users with small/medium sized product that 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 particles such as dust, fumes, and oil mist. The lightweight and compact profile minimizes interference with safety glasses for maximum visibility on the jobsite. Users are provided with a tool that is designed with a simple, push-in fit check mechanism for quick and easy face seal validation.