CPAP Filter - Premium Ultra Fine Disposable Replacement Filters for CPAP Machines - Compatible with ResMed Air 10, Airsense 10, Aircurve 10, S9 Series and More! 30 Filters

These filters seem to be as well made as the expensive, prescription ones sold by the big CPAP medical equipment suppliers. I bought this package for less than my co-pay for 6 filters from my CPAP supplier. They are the exact same dimensions as the prescription filters to fit perfectly in my ResMed CPAP equipment. I'll never buy filters again through the over-priced and over-complicated durable medical device prescription marketplace.