FAQ Search Select a Category BarkBath Cleaning Formulas Cleaning Tips Commercial Products Corporate Deep Cleaners Hard Floor Cleaners Mops, Brooms and Brushes Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go What does Multi-Level Separation mean with my PowerGlide® with Lift-Off® Technology Vacuum? Answer: Multi Level Separation help reduce allergens – Multi-cyclonic separation (Essentially the overall design of the hoses and tank), the pre-motor filters, and the post motor filter work together as a system to pull over 97% of all particles 1 micron or larger out of the air traveling through the vacuum. Also, this filtration system helps to reduce allergens, some of which are the smallest particle sizes referenced in industry filter ratings. Related Questions Why is my vacuum sounding loud? What should I check? Where can I get a replacement brush and brush belt for my BISSELL Go Vac? Why doesn't the power cord rewind fully on my Pet Hair Eraser® or Opticlean® Cyclonic Vacuum? My Powergroom® Pet Canister Vacuum power cord does not rewind fully. What should I do?