Extend device life and efficiency Our filters help keep your lungs clean and prevent dirt and other deposits from entering your engine, helping reduce clogging and maintain performance over time. Premium Cleanflow technology The reusable black foam filter blocks large particles, while the white disposable ultra-fine filter blocks fine particles. Use them together for the cleanest air and enhanced filtration. Perfect fit and compatibility Designed for all M series, for PR System One series, and for SleepEasy Machine. Each filter fits exactly to your machine, ensuring a secure seal and reliable performance. Use scenarios - Nightly CPAP therapy at home with SleepEasy Machine to maintain clean air and protect your device. - Travel with M series or PR System One series devices to preserve filtration quality on the go. - In dusty or pet-prone environments to reduce particle intrusion and keep therapy area cleaner.