Review on 🔍 EnviroCare Premium Replacement Vacuum Cleaner Pre-Filters for Shark Navigator Lift-Away NV350, NV351, NV352, NV355, NV356, NV356E, NV357 - 2 Foam and 2 Felt Filters Included by Mercedes Partridge

They are not comparable to OEM filters. Instead of a felt filter, it's something like a stick of whiskey, or like a pre-filter on my home stack. Also, what they call a felt filter was the wrong size. Since my standard felt filter was still clean and white, I simply replaced the standard foam filter. After vacuuming, the envirocare foam filter was almost completely uncontaminated and my normal felt filter turned brown with dirt. I do not recommend.