I was not impressed with these air filters. Considering the price, I thought these were a quality product but they collapse inside the air intake (and yes, I do put them in correctly with the arrow up) and are just not the same as a couple of years ago. Overall an inferior product with a premium price tag.It was just as the ad said it was right on time and it worked perfectly thank youClean air. What else can I say.Both the 12000 and the 16000 are the best filters I've found. My allergies are noticeably improved, and I only need to dust my wooden furniture about once a month! With all other filters I was dusting at least once a week. Since dust is one of my allergies, these filters are a real life-saver. More expensive than the ordinary filters, but well worth the price.A toilet paper roll has more sturdier cardboard than this flimsy piece of junk. The metal supports are as flimsy as a tie you wrap around a bag of trash. Normally I buy Filtrete brand but thought I would try these. Luckily I only bought two.. and in 3 days I have gone through both. I just ordered Filtrete few minutes ago.I put one of the filters in the air carrier, exactly as directed. I noticed the entire filter seemed awfully flimsy when I unwrapped but went ahead and used it anyway. The unit was not producing the correct air flow so I checked the filter. It was all scrunched up stuck in the air carrier. I didn’t want to “waste” the air filter as they are not cheap in price, only quality. I attempted to straighten it and thought about using duct tape to give the frame better support. I did not. I reinserted it and the same thing happened. I have no choice but to unwrap the remaining one and it is as useless as the first one.The Filtrete air filters will be delivered Friday so I will have to leave the AC off until the order arrives. I will never buy this brand again.. I will call the company tomorrow about the poor design of the filter. These filters should be sold at the Dollar Store for $1.99! Thoroughly disgusted but if you want to waste money or believe pictures don’t reflect the description, go ahead and buy. They won’t last 48 hours, much less 48 days!Did not hold up well. Product was flimsy and dirty looking. Smells moldy. Will not purchase againI run 3 on my system, don’t know if notice odorDifference… except there is none.. so I figure they gotta help.. we’ll made, love that they are sealed individually instead of laying in an open box.. $ value is greatAwesome packaging and significantly easier to breath inside after the 4th day of use. Will be buying these filters again.