Blue Pure 411 Replacement Filte-r Compatible with Blueair Blue Pure 411 Genuine, 411+, 411 Auto and Mini Air Purifie-r, Include 3 Particle and 3 Activated Carbon

I have a few 411s at home, and uses these filters as replacement every 6-12 months. They work as well as the original ones, are much cheaper, and are exactly to specs (with I presume a carbon inner lining). It does ship folded, but it'll work just fine when you install it in your air purifier. My second purchase, probably going to get more whenever I run out.

I'm happy with these filters. Much cheaper than name brand

fits perfect, like original. We will see how long it lasts, but I did order another set.

The filter works well and about as expected for the price. It’s about the same accordion size as the original (I have a 411+), but as you can see it is slightly misshapen, possibly also from it being flattened in the box. It is also a little tall/uneven so the bottom piece did not precisely close but it is still level enough and works as is.

Relatively trouble free.

Good Replacement filters. Fit snug and nice.

No problems.

I can't tell the difference between this and the original filters. I have two machines so this 2-pack is perfect. Under $60 a year for clean air, what are you waiting for.

Good value for the money. You get 2 for the same price as the original. Works the same as original, no odd smells from filter either.

This filter fits my Blue Air 411 Auto. It fits perfectly. A great replacement filter.

If fit couldn't tell you how long it will last

fits the bill... better to change the filter to keep the air purifier operating at desired quality