N60 Pet Odor Control for Purobot Ultra and Purobot Max Pro Self-Cleaning Cat Litter Box, Long-Lasting Effective Litter Box Odor Remove, Natural Formula (Pack of 3)

Keeps odors in perfectly - honestly the best system I’ve tried. It works great, feels reliable, and does exactly what it promises. Highly recommended.

this is one of two types of deodorizers you need and is the most expensive one. But you don't want to go without it. Both the bags and the deodorizer that fits into the used litter bag tray can be purchased at much lower price. I didn't find a lower price on this N60 one but it might be worth doing. Lower price ones are not Petkit brand, whereas this one is.

Works great! Definitely helps the smell. Lasts reasonably long.

I will honestly say I haven’t opened them yet (seriously need to kick myself into replacing the old ones in the litter box already) but these were not bad in the budget for three!

These don't 100% eliminate the odor in the collection chamber, so don't expect it. It does help. The reason for 4/5 is because they have the distinct smell of a porter potty cleaner additive.