Dirt Devil U-Micro Filtration Bag, 12 Bags Treated with Ultra-Fresh for Models 3920047001, 3920048001 and 3920750001 DIRT DEVIL Breeze, Featherglide, Featherlite, Jaguar, Platinum Force, Swerve, Swivel Glide and Vibe Uprights Micro Filtration vacuum bags also capture 99% of particles 5 microns in size, including household fibers and other microscopic allergens The Ultra-Fresh finish on these bags protect against odor and stain-causing microbial growth; This helps keep your bag cleaner and fresher Ultra-Fresh treated bags are guaranteed from defects