Scientifically proven to reduce exposure to allergens by trapping over 99.9% of dust and allergens inside the vacuum not into the air you breathe. HEPA filters alone are not enough to hold dust and allergens inside a vacuum. Harmful allergens can escape around the filters and back into the air you breath. Shark Navigator NV352 Upright Vacuum Cleaner is one of many available through Office Depot. Made by Shark.