IMPRESA 3 Pack 211 Replacement Pre-Filters - Compatible with Blueair Blue Pure 211+ Air Purifier Filter - Lunar Rock Gray Fabric - Washable Slip-On Slip-Off Design & Extended Main Filter Life

Nice light gray color and they fit perfectly.

fit perfectly

You should change the cloth filter at least every 3-4 weeks. I have animals and it prevents the animals hair frim getting into the main filter causing me to change the charcoal filter more often. It is good quality. Was the cloth filter in cold water and hang dry. Do not put it in the dryer. Buy a few so when you wash the cloth filter, while you wait for the ones you washed to dry, you can put a clean cloth filter on to continue to have a clean cloth filter on. Again, do not put the cloth filter into the dryer.

Photo is of new Impresa filter on top of new BlueAir filter. Impresa was skimpy, difficult to put on, and did not completely cover unit. The material is thinner than original and will likely not function as well. I ordered them for the color, but I should have returned them.

I'm not a fan of how cheap these look, but they were very easy to install. I'll know in 3 months how well they work.

Works perfectly , good value for money . Had to replace the old covers , love these . They are nicer looking and work just as good if not better

Nice product at a good price.

I have bought these three times and gave the first package a five. But the third package is slightly too small for my Bluair211 air purifier. I have to really pull trying to get it around the filter and it still won't completely reach to the bottom on all sides.Question: Why was a good product made less effective? How can I find one like the first one I purchased in the past?