Upgrade your therapy with high-efficiency filtration for sensitive airways using the ResMed AirSense 11 Allergy/Pollen Filter. Designed for the AirSense 11, this filter captures finer particles than standard filters, including pollen and airborne allergens, helping reduce nasal irritation and improve comfort during CPAP use. Ideal during allergy seasons or in dusty environments. Replace regularly (typically every 1–2 months, or sooner with visible build-up) to maintain optimal performance.