HEPA Filter Face Mask Polypropylene Replacement HEPA Filter Sheets For Masks Reusable HEPA Inserts For Face Masks (Adult Filters, 4 Pack)

I have a Scientific Background so what I choose is Science Driven when it comes to this contagious/deadly infinitely small virus molecule. I RARELY write reviews but HAD To on these when I just received them today. I did my due diligence on selecting THESE. I saw these are made in CANADA ("our friends") and you get what you pay for. These may look pricey but READ! These are H-13Hepa (MEDICAL GRADE) so they are THE BEST HEPA at filtering; BETTER than H10 or H12 HEPA. Also, they are THREE layer filters SEWN together. NOT flimsy one layer so I was not deceived on others who appear you get more. THE BEST filter for FILTERING VIRUS and these are EXCELLENT QUALITY. Know that HEPA can be reused over and over and over again. Each HIGH QUALITY SEWN FILTER lasts AT LEAST a month depending on how much you use it. I thank you for making these and Amazon for having these and keeping me and my fellow Americans as SAFE as possible during this highly infectious plague. CLEAN and an EXCELLENT PRODUCT FROM AWESOME CANADA!

This product made in Canada is made of great quality. They appear a little thin but once inserted they do their job. I only wish I had a bigger filter pocket. I double mask with a surgical mask on the bottom and I don't feel like my breathing is restricted. There 3 layers of polypropylene. My only suggestion would be to label the front and rear of the filters. The dotted part faces out the softer part faces the inside. If your on the fence on buying these buy them!

I have been using this filter for about 4 weeks and it fits into a cloth mask I have with an internal pocket for filters. I do not have problems breathing through the filter. I haven't used it long enough to know how long each filter will last but so far I am pleased and see no reason why I would not buy more if and when they are needed. I should note that I work from home and do not get out much due to COVID so I have not used the filter a great deal.

These filters are perfect! Very nicely made, you can tell they are handmade and individually wrapped in plastic to protect from contaminates! I feel much safer and protected from the virus with a hepa filter in the pocket of my masks ! Easy to breathe though. A little pricey, but as always you pay for quality !!!!

It fits well into the filter pocket at the top of the mask and covers nose and mouth. I like that it is reusable after a 48-72 hour airing. Only problem is I wanted to order some more yesterday and could not find them on Amazon and was disappointed.

Made in Canada - just what I wanted Delivered promptlyThank you

While it is not easy to insert and most insertions wind up being somewhat less than neat, it is comforting to know that I have an extra layer of protection.

Like many people I purchased polyester logo masks at the beginning of the pandemic because they looked nice. However we have since learned that these masks are no good at protecting you - the person who wears them - because covid droplets can get through them. However one way to make them safer is to purchase filters that fit inside the mask. Unfortunately these filters are super thin and cheap, and they do nothing to protect the incoming air as it bypasses the filter and goes straight around the sides and top of the mask. The mask protects other people, but not YOU.So do yourself a favor, don't waste money on this useless product - instead buy a top quality KN94 mask which will protect YOU.