F1 Standard Replacement Filters (3 Pack) 99.8% Active Carbon Filtration with One-Way Discharge Valves, 3 Sizes

Filters well. Had to use the strap extention, but other than that it works great!

Everything seems fine and the filters shipped quickly. Overall this was a good purchase.The mask these go with is much more comfortable than the fully disposable masks and also seems less wasteful since less is disposed of when the filter needs replaced. The filters themselves seem to do the equivalent of the fully disposable masks so I don’t think there is a difference in protection.Plus when compared to the vented disposable masks this option is much cheaper and prevents fogging just as well or maybe even better.

easy to use

Works well

Good with mask

I've been using these filters since the great pandemic of 2019-2020. I still use them today for various projects.

Great delivery time good product

It was exactly what I needed.