50 pks PM2.5 - Carbon Filters - 5 Layers Anti Haze filter paper for face cover - UK Seller

Nothing to dislike

They’re a nice fit and good value.

They fit a variety of masks. The same as often supplied with masks but gives the opportunity to change filters more often.

Good product to accompany face masks.

Prevents glasses steaming, adds this extra layer of protection and is reasonably priced. Wish these were available a couple of years ago when COVID was everywhere.

as expected

Bought a pack of 50 as it was the same price as packs of 10/20/30 also sold on Amazon, and why bother paying extra for less when you're only getting the most basic, mass-produced filters available, right?All 50 came wrapped in a single cellophane/plastic pack which was hole-punched on either side, with no additional wrapping per 5 or 10 filters as stated in the Q&A's. Of the first few I pulled out of the pack, 2 of them had flecks of dust/dirt on them, so they're obviously not packaged in a sterile environment. The rest look clean, all are uniform and seem to be well-made.I cut one up and there are indeed 5 total layers - two thin, porous outer layers, two thicker cloth filters, and a central black 'carbon' filter which is very see-through and probably doesn't do much.These are probably fine to use and no doubt a good economy purchase, but I would have preferred better packaging as was stated by others in the Q&A's, and no dirt on any of the filters upon opening. Considering you're putting these in a mask you're going to be breathing through all day, that's a pretty basic expectation!

I prefer reuseable products i.e. face masks, and these inserts are more practical than fully disposable masks.