new, double-sided filters allow better breathability; protection against particles; quick and easy connection; simply push the filter into the mask housing until you hear a click; use with 3M™ Secure Click™ 800 Series masks; particulate filter P1 R for use in combination with the 3M™ Secure Click™ D8000 series gas and vapor filter; the design allows for a better field of vision and comfort; 3M™ Secure Click™ - particle filter P1 R D7915 has CE approval for environments containing solid and liquid particles; use with 3M™ Secure Click™ 800 Series and 3M™ Secure Click masks and 3M™ D701 filter holder