20pcs Five-layer Activated Carbon Filters with 10 Exhaust Valves, DIY Replacement Non-Woven Filter Accessories Set Unisex Anti Pollen Allergens Dust Fit for Most Cycling Masks

Same comment, ... these are the replacement parts for a mask ( the mask is NOT purchased with this product, ... buy separately ) and that mask is great !So with COVID-19, ... you can wash the mask, or put the mask ( not sold with these replacement filters in this product-offering !! ) in the sun ( UV A & B ) / wind to clean and replace the filters ( the product sold here !! ).Good ( mostly ) / Bad points:1. My experience with the combination ( Mask + Filters ) is that this mask is superior to dental hygiene-type masks or 'wet-suite' / neoprene ( smelly and not semi-rigid ) masks. This is because, ... with two layers on the mask, ... and five for the filters sold here, ... that adds up to 7 layers of protection. The CDC is recommending three-layer masks, vs. this seven-layer mask.2. Also, this mask is semi-rigid and does not collapse when you breath-in hard ( like when I am sprinting on my bicycle ).3. The actual mask ( for "Outdoors, Sports, Motorcycling" ) is durable, washable and inexpensive ( ~ $14 on Amazon ).4. The 'valves for exhausting your breath provide for a lot of air / oxygen to pass through ( out, in the case of the valves, as they are one-way ) and you do not fog glasses, or feel like you are suffocating trying to get enough air-volume in.5. The replaceable inner-mask component is five-layer with activated charcoal and meets the PM 2.5 ( Particulate Matter 2.5 diameter international standard ) which between the mask layers ( 2 ) and this filtering components ( 5 ) will very likely stop, in indoor or outdoor situations, most COVID-19-laden water-droplets from entering or leaving the mask !!6. ONLY problem is the long-shipping times and losing tracking information on the Amazon site.

As I write this review I am stunned at 34% of the reviews are one star due to assuming the mask was included and complaining about the size. The product information clearly stated that these were replacement filters and vents ONLY. However, the photo is an accurate depiction of the type of mask these fit.These are, indeed high quality carbon N99 replacement filters that perfectly fit the masks depicted. They are not too small for these masks and I can verify that when properly installed and the mask is properly fitted, you can't even smell hand sanitizer through them. They are THAT good of quality. I would buy these again and from this seller.Be aware that these are coming on a slow boat from China. Yes they arrived nearly six days later than estimated but I knew that would probably be the case when I ordered them. I contacted the seller a couple of days after the estimated arrival date passed. The response was immediate. The seller had and supplied better tracking info that I could see on my end. They asked for a few more days of patience due to the logistical nightmare the pandemic has caused on both sides of the world. The filters arrived a few days later just as the seller thought. I'm pleased with the product and satisfied that this seller is legitimate.Honestly, these filters are worth the the wait if you already own the mask.If you have the filters but not the mask, order a mask to fit the filters because you have the good ones.https://www.amazon.com/Pollution-Activated-Particulate-Respirator-Protection/dp/B07ZCMGJK1/ref=sr_1_23?dchild=1&keywords=sports+mask&qid=1592588907&refinements=p_85%3A2470955011&rnid=2470954011&rps=1&sr=8-23

Muy incómodo

Delivery made it to LA customs on time. It was a late delivery due to a pandemic, protests, and riots, but the U.S. Postal Service was able to get it to Ohio. The filter and valves are better than the ones that came with the masks I ordered. When inserting the filter and valves into the mask, it does not look like an exact fit. Once I put it on, it my face better than the one that came with the mask.

Great quality product but has a slight chemical smell. And could cause a mild reaction to the skin. But overall I loved it.

I thought I was receiving a mask also because of the pictures shown. It's only the filters. Other than that great!

These are thinner than the ones that shipped with me mask, but they work. I do feel like I’ll be changing them out more often. My five o’clock shadow cause these to fuzz up where the initial filter just kept on trucking.

Unfortunately I chose the wrong size for my mask. My bad