Review on Premium Pack of 4 Pre-Motor HEPA Filter Replacements for Shark ION Robot Vacuum Cleaner - Fits 🔍 RV700_N, RV720_N, RV850, RV851WV, RV850BRN/WV - Part # RVFFK950 - Also Compatible with Shark IQ Robot R101AE, RV1001AE, UR1005AE by Katrina Coniglio

It's worth the price. They fit perfectly in the slot. Two bonuses were included. A dust mask and cleaning brush that should come with the vacuum cleaner. I gave four stars because it cannot be washed. But with the extra brush they give you. I think you can at least dry clean it and that will extend the life of the filter. I would recommend it to anyone on a budget. With the original and this pack, I plan to swap them out once a month.