Disposable ultra-fine filters for Respironics System One 50 or 60 series. white fine fibers that filtrate air prior to you breathing it through your CPAP machine. The filters are designed to add additional filtration in homes with high pollen, dust particles or pets.
Filters are disposable and are not meant to be reused. Dispose if the filter gets wet or if it starts dis-colouring. Replace filters every 2-6 months or as needed.