These filters are small but will last a month in my machine. I use the black filters and wash them weekly. No problems or concerns. By JM, OK
easy to change
A necessary evil but at least they're easy to change By Stevie, Washington
They fit, they help filter out dust. They Work well. By Annette, Pennsylvania
Excellent filtration. By Scott, New Hampshire
cpapxchange is a wonderful online resource for filters as well as cpaps and all the needed accessories. The filters I purchased are made for the cpap and fit just the way they should. They last a month at least. By Jannie, OK
Nessessary to have but pricey!
Would rank five stars if not over priced. Put more in the package or lower price. By Dave in PA CPAP user since 1987, Lancaster