4WDKING WDKFB1/WDKAM1 Mask Host Replacement Filters - 3 Pieces

Fits great - tight, no gaps. These are HEPA-13 (medical grade) for the Aurora HEPA mask with 3-Speed fan. The air flow was dropping off with the old filter - now it's a good as new. Side by side the old filer was getting darker - the new one is pure white - which would have otherwise been in my lungs! Replacement is very simple once you do it once (a bit tricky the first time). Excellent value.

Fits perfectly as a universal filter for my Holmes brand. Fast shipping

I have COPD and have been limited, especially with animals, outdoor air, smoke. I have been able to go to other people houses with this. Though buy extra filters because the filters really do collect the dander and other impurities. It does really help

Good quality far pricing. Work as described.

These came quickly and the fit perfectly in my portable air purifier. I carry one in my purse to use instead of a regular mask since I have asthma and they make it much easier to breathe. The filters last for a long time, so I feel they are are a good value.