Upgrade your sleep therapy with the Sunset Healthcare PR System One Filter! This disposable, ultrafine filter traps dust, pollen, and allergens as small as 0.3 microns, promoting cleaner air and potentially better sleep for CPAP users. Designed specifically for Respironics PR System One machines, it ensures optimal performance and protects internal components, extending its lifespan. Breathe easier and experience potentially reduced allergy symptoms with this effective filtration, all at an affordable price. Easy to install and replace, order your pack today and wake up feeling refreshed and rested!