Designed for performance and simplicity, the AirSense 11 Standard Filter helps block environmental particles like dust, dirt, and debris—supporting better air quality and longer device life. This 2-pack provides a full year of filtration with easy, no-hassle replacements. Made from non-woven polyester (polypropylene/acrylic), these filters effectively trap dust and particles to help maintain clean airflow and protect your device. Each pack includes two filters designed specifically for the AirSense 11, ensuring a perfect fit and optimal performance. A hypoallergenic version is also available for sensitive users.