Trap any ultra-fine dust particles down to 0.3 microns (particles about 1/300th the diameter of a strand of hair) and keep 99.97% dust inside the vac or dust collector and out of your shop!
The ultra-fine filtration prevents vacuum motor failure caused by dust entering the motor.
Non-stick filter membrane resists clogging - dust and dirt simply fall off the filter surface before it can build up.