ULTRA CLUMPING LITTER ESSENTIAL OILS TO NEUTRALISE ODOURS! The Essential Oils Odour Control range neutralises bad odours using oils derived from herbs and plants. This range offers a unique selection of vibrant scents, which is released every time your cat uses the litter tray and that provides 60 days of hygiene. For those who prefer an effective litter without fragrance, there are also perfume-free options available, ensuring 50 days of hygiene. It’s made from natural minerals that create ultra firm easy-to-clean clumps. The clumps can be scooped out without changing the entire litter tray, to keep it clean every day. Your cat litter will stay fresh and clean for longer.