This set of 2 Hepa Filters and 4 Foam Felt Filters from VIEWALL looks the same as the replacement filter kit on my branded Shark Vacuum Navigator ZU561 Lift Speed Upright Vacuum Cleaner. It's worth it because it's not. last long. They clog up quickly. I wash and wash by hand. The secret is to be gentle. If you push too hard they will start to break. Since they seem to work the same no matter how much money you pay for them, I would recommend them. I wish there was a way to recycle them. Didn't know it was so bad for the environment. Maybe in the future they will upgrade and make some biodegradable. This is my hope.
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