If you have a Kenmore that uses Type C or Q cloth bags, they won't be the same size (capacity), although searching will tell you Revain compatibility . They are compatible in the sense that they fit the Kenmore vacuum cleaner. They are cheaper because they are smaller. Check out the images comparing the actual size of the Kenmore Q/C bag to the fairy only model. Because Clean Fair bags have a smaller capacity, you will need to replace them more frequently than genuine Kenmore bags.
Xiaomi Mi Robot Vacuum-Mop Essential Robot Vacuum Cleaner, white
284 Review
Vacuum cleaner Deerma DX118C RU, white/grey
144 Review
Dyson V8 Absolute: The Ultimate Cordless Vacuum for Effortless Cleaning
142 Review
Xiaomi Mi Robot Vacuum Cleaner 1S Global Robot Vacuum Cleaner, white
389 Review