Enhanced Breathing Experience: Our CPAP filters are designed to block over 99.99% of harmful particles, ensuring that only 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 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 highest air quality, replace filters every 3-4 weeks depending on environmental conditions. Regular replacement helps capture more impurities and enhances overall effectiveness of your CPAP machine. Installation Advice for Heated Tubing: If you use heated tubing, do not connect filter directly to machine. Instead, attach filter between silicone end of heated tubing and mask to proper functioning and maintain device integrity. Quantity:9PCS Color:Transparent Material:plastic Package Contents: 9 x Inline CPAP Filters Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.