To block even the smallest of particles, the one-pack of Reusable Foam Filters for M Series, PR System One, and SleepEasy is made of polyurethane foam.
Designed for the M Series, PR System One, and SleepEasy, the filter is washable and reusable and should be changed every six months.
This filter is just fine, but the description is misleading. It's listed as "one pack." Well, it's one,... more...
Wish it came 6 to a pack
Cheap. Odors will not wash out. Add says filters. Ridiculous price for QTY 1 filter. Not happy at all with... more...
Quick shipping & exactly what I Ordered.
I would much rather use the reusable filter. They work nice.