These biodegradable replacement liners have been specifically designed for the Catit Design SmartSift, making litter management very convenient. The liners are easy to install and are designed to fit perfectly in the cat litter box base. They effectively prevent waste clumps from sticking to the surface of the base, significantly easing the cleaning process. When the bag is full, simply remove it and dispose of it. The liners are environmentally friendly and decompose in an organic or regular landfill.