: These filters are made of ultra-fine fiber cotton which can effectively filter fine particles, dust, and pollen. BPA-free, safe and reliable.Thickened Design: While other filters are approximately 1mm thick, these filters are about 3mm thick, allowing for improved filtration of fine particles and airborne contaminants, enhancing the performance of the respirator.Better Compatibility: Each filter measures 2 x 0.9 inches. Designed to fit Airsense 11 machines with minimal gaps, ensuring efficient filtration.Improve Air Freshness: Each filter is engineered to capture fine particles and larger particulate matter, delivering cleaner and fresher air from the ventilator, helping to support better air quality and patient comfort during sleep.Extend Machine Life: Airsense 11 filters help prevent dust and impurities from entering the ventilator, reducing internal wear, minimizing maintenance needs, and extending the lifespan of the device.Color: WhiteMaterial: CottonPackage Contents: 30 x FiltersNote: Light reflection and differences in display screens may cause slight variations in color appearance. Measurement may vary by +/- 1-3 cm.