Lightweight, weighs only nine pounds. Backpack style has deluxe nylon woven shoulder harness for comfortable, trouble-free use. Chiropractor designed, ergonomic harness includes sternum clip to secure shoulder straps. HEPA inner filter traps 100% of common dust mites, pet allergens and pollens from the air. Clear dome lid for instant debris inspection. Shake-out cloth inner filter bag. Hypercone™ cartridge filter is three stage, HEPA Type, 99.95% @ .3 Micron. Powerful 9.6 Amp, two-stage motor generates air flow of 120 CFM.