I've attached anti-chew covers. They're the ones that came with it, plus some from the 100-yen store. There's also a filter, but as you can see in the third image, the activated carbon part was chewed by the previous owner. In terms of how it feels to use, I think you could substitute with things like ventilation fan filters from 100-yen stores. This is a hair collection machine that can firmly catch loose hair and hay dust that floats inside a small animal cage. It has a 2-stage switch, so you can switch to "HI" during shedding season to collect hair thoroughly, and use "LOW" for circulating hay dust and stuffy air in the cage. It firmly catches loose hair with the hair collection non-woven fabric. Daily maintenance is easy, just replace the filter, making cleaning easier. It has a cross-groove design that allows for easy and secure fixing to the cage. It's also a self-supporting type that can be used for grooming. Chinchilla Degu Guinea Pig