Enhanced Breathing Experience: Our CPAP filters are designed to block over 99.99% of harmful particles, ensuring that only the cleanest air reaches your lungs. This advanced filtration technology helps maintain a healthy respiratory system, especially crucial during sleep. Optimal Airflow for Comfort: CPAP filters are engineered to not restrict airflow, ensuring that you can breathe easily and comfortably throughout the night. If you experience any difficulty in breathing, simply adjust your machine's airflow settings for immediate relief. Universal Compatibility: These filters are universally compatible with all standard and heated CPAP tubing. Regular Replacement for Maximum Efficiency: To maintain the highest air quality, replace the filters every 3-4 weeks depending on environmental conditions. Regular replacement helps capture more impurities and enhances the overall effectiveness of your CPAP machine. Installation Advice for Heated Tubing: If you use heated tubing, do not connect the filter directly to the machine. Instead, attach the filter between the silicone end of the heated tubing and the mask to ensure proper functioning and maintain device integrity. Condition: New Package Contents: 9 x Inline CPAP Filters or 6 x Inline CPAP Filters. Only the above package content, other products are not included.