How to improve air filters that appear to be made out of used clothes dryer sheets?

Inside a dirty echo with a real paper or paper like air filter.
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I first saw these "fleece" air filters in Mitsubishis where Denso was the OEM. Wish I knew more about them or how they compared to cellulose paper filters

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I noticed that the Denso filter above had "PET" printed on it, which stands for polyethylene terephthalate. I tried researching this but cannot find any information on how this material compares to cellulose. I assume the polyethylene filter is more durable and has a higher efficiency, similar to polypropylene HEPA filters?

I'm interested in learning more if anyone has any insight.
 
I noticed that the Denso filter above had "PET" printed on it, which stands for polyethylene terephthalate. I tried researching this but cannot find any information on how this material compares to cellulose. I assume the polyethylene filter is more durable and has a higher efficiency, similar to polypropylene HEPA filters?

I'm interested in learning more if anyone has any insight.
Water and soda bottles are PETE. But processed like a non-woven fiber, a knit.

I think Donaldson does the same with their PowerCore filters.
 
A little more than a year and a half on this Hyundai sonata air filter with k&n oil.
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The air filter box is slightly cracked and the factory cold air snorkel was blown away from the deer encounter.
Go fast ones are probably worse in every way I can think of and cost $300 to $400.
Used OEM ones are less than $140 for the box and snorkel shipped. Hopefully a junk yard one will work and I won't need to go out of my way to ebay a used one that came from a hybrid.
 
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