Features of Oxygen Active Cabin Air Filter 3B0091800 for AUDI 80 B4 & AUDI A4 B5

• 1. Multi-Layer Fiber Structure, Efficient Filtration: Our Oxygen-Generating Air Conditioning Filter uses multi-layer fibers and advanced materials to block PM0.3+ particles. PM2.5 filtration efficiency ≥95%, creating a clean breathing environment inside vehicles. Its High-efficiency filtration layer use electret electrostatic melt-blown non-woven fabric with a labyrinthine open-fiber structure enhances dust-holding capacity, uniform pore density, and filtration efficiency.
• 2. Negative Oxygen Ion Release, Enhanced In-Car Environment: Generates small-particle negative oxygen ions at 12,500 ions/cm³, mimicking natural freshness for an "in-car oxygen bar." Benefits: Boosts alertness, improves immunity, reduces fatigue-related driving risks, and ensures a healthy, comfortable cabin environment.
• 3. Formaldehyde Decomposition & Odor Removal: Neutralizes harmful gases and odors with a formaldehyde decomposition layer ( formaldehyde removal is up to 99%, sulfur dioxide is up to 98.6%). Reduces formaldehyde and TVOC levels within 15 minutes, maintaining fresh air quality.