K&N HVAC Air Filter Various Sizes 25% off. Final cost depends on size $40

Clip the "Save 25%" under the price
I wouldn’t pay full price for it but at 25% off, I’ll give it a try. These can be cleaned and reuse without buying their cleaner.
Link is for reference, size 16x25x1
https://www.amazon.com/gp/product/B07PKLRW8P