3M 2097 P100 NIOSH FILTER WITH ORGANIC VAPOR 1 PAIR PER PACKAGE FREE SHIPPING!!! The 3M 2097 P100 Filters fit on the 3M 6000 and 3M 7500 Series Half Masks, as well as the 3M 6000 Full Face Respirators. HEPA filtration is rated to remove 99.9% of particles .3 microns and larger. This includes most welding fumes (burnt metal), toxic dusts, like asbestos and lead, Bondo and particles created by bodywork. They also help folks who have allergies to many of the environmental dusts. Sometimes called a pancake filter, they are attached directly to the mask. A simple 1/4 turn locks them on, and no retainers or other attachment methods are needed.