A litter tray filter only works if it actually fits the vent it's covering, and most trays don't share the same hood dimensions, which usually means buying tray-specific filters or going without. Clean 'N' Tidy get around that by making the pad bigger than any single box needs and letting you trim it down.

The filter is supplied as one size, designed to be cut to fit whichever Clean 'N' Tidy hooded box you own, sitting over the vent to catch odour as air passes through rather than letting it out unfiltered. It's a maintenance item rather than a one-off purchase, meant to be replaced as it becomes saturated.

• One size, cut to fit any Clean 'N' Tidy hooded litter box
• Fits over the tray's ventilation point
• Designed to make cleaning and odour control easier

On trimming it. Clean 'N' Tidy don't state how long one filter lasts before it needs replacing, so treat it as something to check periodically rather than on a fixed schedule, and cut carefully the first time as there's no guidance on how to trim it beyond "cut to fit".

Who it's for: owners of a Clean 'N' Tidy hooded litter tray who want a replacement filter rather than running the hood without one.