I've reused a few times, they're strong enough to rinse under the tap. Doesn't crumble like paper. Unless you're picking up fine dust, you can empty your vacuum dozens of times before you need to wash or replace the filter.
Xiaomi Mi Robot Vacuum Cleaner 1S Global Robot Vacuum Cleaner, white
389 Review
Dyson V8 Absolute: The Ultimate Cordless Vacuum for Effortless Cleaning
142 Review
Xiaomi Mi Robot Vacuum-Mop Essential Robot Vacuum Cleaner, white
284 Review
Robot vacuum cleaner Roborock S5 MAX Global, black
298 Review