Review on Allergen Filters Replacement Ultra Light XFFV300 by Alexander Craner

I have had a Shark Rocket 300HV for 5.5 years and only washed the original filters until I bought these. A great investment in a vacuum that used to work but now works better with better suction. Considering the price of these filters I'm not concerned about their durability as they are inexpensive. If each filter set lasts 6 months after monthly cleaning, then 18 months with these filters, where can I complain that they are not worth the price. I am a person who believes in fixing the things I own and waiting until repairs become too expensive.