If you use a CPAP or BiPAP from DreamStation, ResMed HumidX™, or another top model that requires a filter, you've come to the right place. Choose your preferred filter at CPAP Supply USA! With both reusable foam and CPAP pollen filter options, you can effectively remove dust, pollen, and smoke particles from your airflow for three to six months at a time. Using a DreamStation reusable filter means, at most, you only need to change out your filter twice a year. A Sunset Healthcare or Respironics reusable pollen filter performs best when hand washed with warm water every few weeks, ensuring that all existing contaminants have been wiped clean. Breathe in clean air during each sleep apnea treatment with a foam or CPAP pollen filter from CPAP Supply USA and receive free shipping on all orders.